drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 static int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118         /* allow CTS-to-self if possible. this is relevant only for
 119          * 5000, but will not damage 4965 */
 120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 121
 122         ret = iwl_check_rxon_cmd(priv);
 123         if (ret) {
 124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 125                 return -EINVAL;
 126         }
 127
 128         /* If we don't need to send a full RXON, we can use
 129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 130          * and other flags for the current radio configuration. */
 131         if (!iwl_full_rxon_required(priv)) {
 132                 ret = iwl_send_rxon_assoc(priv);
 133                 if (ret) {
 134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 135                         return ret;
 136                 }
 137
 138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 139                 return 0;
 140         }
 141
 142         /* station table will be cleared */
 143         priv->assoc_station_added = 0;
 144
 145         /* If we are currently associated and the new config requires
 146          * an RXON_ASSOC and the new config wants the associated mask enabled,
 147          * we must clear the associated from the active configuration
 148          * before we apply the new config */
 149         if (iwl_is_associated(priv) && new_assoc) {
 150                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 152
 153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 154                                       sizeof(struct iwl_rxon_cmd),
 155                                       &priv->active_rxon);
 156
 157                 /* If the mask clearing failed then we set
 158                  * active_rxon back to what it was previously */
 159                 if (ret) {
 160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 162                         return ret;
 163                 }
 164         }
 165
 166         IWL_DEBUG_INFO("Sending RXON\n"
 167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 168                        "* channel = %d\n"
 169                        "* bssid = %pM\n",
 170                        (new_assoc ? "" : "out"),
 171                        le16_to_cpu(priv->staging_rxon.channel),
 172                        priv->staging_rxon.bssid_addr);
 173
 174         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 175
 176         /* Apply the new configuration
 177          * RXON unassoc clears the station table in uCode, send it before
 178          * we add the bcast station. If assoc bit is set, we will send RXON
 179          * after having added the bcast and bssid station.
 180          */
 181         if (!new_assoc) {
 182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 184                 if (ret) {
 185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 186                         return ret;
 187                 }
 188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 189         }
 190
 191         iwl_clear_stations_table(priv);
 192
 193         if (!priv->error_recovering)
 194                 priv->start_calib = 0;
 195
 196         /* Add the broadcast address so we can send broadcast frames */
 197         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 198                                                 IWL_INVALID_STATION) {
 199                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 200                 return -EIO;
 201         }
 202
 203         /* If we have set the ASSOC_MSK and we are in BSS mode then
 204          * add the IWL_AP_ID to the station rate table */
 205         if (new_assoc) {
 206                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 207                         ret = iwl_rxon_add_station(priv,
 208                                            priv->active_rxon.bssid_addr, 1);
 209                         if (ret == IWL_INVALID_STATION) {
 210                                 IWL_ERR(priv,
 211                                         "Error adding AP address for TX.\n");
 212                                 return -EIO;
 213                         }
 214                         priv->assoc_station_added = 1;
 215                         if (priv->default_wep_key &&
 216                             iwl_send_static_wepkey_cmd(priv, 0))
 217                                 IWL_ERR(priv,
 218                                         "Could not send WEP static key.\n");
 219                 }
 220
 221                 /* Apply the new configuration
 222                  * RXON assoc doesn't clear the station table in uCode,
 223                  */
 224                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 225                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 226                 if (ret) {
 227                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 228                         return ret;
 229                 }
 230                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 231         }
 232
 233         iwl_init_sensitivity(priv);
 234
 235         /* If we issue a new RXON command which required a tune then we must
 236          * send a new TXPOWER command or we won't be able to Tx any frames */
 237         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 238         if (ret) {
 239                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 240                 return ret;
 241         }
 242
 243         return 0;
 244 }
 245
 246 void iwl_update_chain_flags(struct iwl_priv *priv)
 247 {
 248
 249         iwl_set_rxon_chain(priv);
 250         iwl_commit_rxon(priv);
 251 }
 252
 253 static void iwl_clear_free_frames(struct iwl_priv *priv)
 254 {
 255         struct list_head *element;
 256
 257         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 258                        priv->frames_count);
 259
 260         while (!list_empty(&priv->free_frames)) {
 261                 element = priv->free_frames.next;
 262                 list_del(element);
 263                 kfree(list_entry(element, struct iwl_frame, list));
 264                 priv->frames_count--;
 265         }
 266
 267         if (priv->frames_count) {
 268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 269                             priv->frames_count);
 270                 priv->frames_count = 0;
 271         }
 272 }
 273
 274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 275 {
 276         struct iwl_frame *frame;
 277         struct list_head *element;
 278         if (list_empty(&priv->free_frames)) {
 279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 280                 if (!frame) {
 281                         IWL_ERR(priv, "Could not allocate frame!\n");
 282                         return NULL;
 283                 }
 284
 285                 priv->frames_count++;
 286                 return frame;
 287         }
 288
 289         element = priv->free_frames.next;
 290         list_del(element);
 291         return list_entry(element, struct iwl_frame, list);
 292 }
 293
 294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 295 {
 296         memset(frame, 0, sizeof(*frame));
 297         list_add(&frame->list, &priv->free_frames);
 298 }
 299
 300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 301                                           struct ieee80211_hdr *hdr,
 302                                           int left)
 303 {
 304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 306              (priv->iw_mode != NL80211_IFTYPE_AP)))
 307                 return 0;
 308
 309         if (priv->ibss_beacon->len > left)
 310                 return 0;
 311
 312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 313
 314         return priv->ibss_beacon->len;
 315 }
 316
 317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 318                                        struct iwl_frame *frame, u8 rate)
 319 {
 320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 321         unsigned int frame_size;
 322
 323         tx_beacon_cmd = &frame->u.beacon;
 324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 325
 326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 328
 329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 331
 332         BUG_ON(frame_size > MAX_MPDU_SIZE);
 333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 334
 335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 336                 tx_beacon_cmd->tx.rate_n_flags =
 337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 338         else
 339                 tx_beacon_cmd->tx.rate_n_flags =
 340                         iwl_hw_set_rate_n_flags(rate, 0);
 341
 342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 343                                      TX_CMD_FLG_TSF_MSK |
 344                                      TX_CMD_FLG_STA_RATE_MSK;
 345
 346         return sizeof(*tx_beacon_cmd) + frame_size;
 347 }
 348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         unsigned int frame_size;
 352         int rc;
 353         u8 rate;
 354
 355         frame = iwl_get_free_frame(priv);
 356
 357         if (!frame) {
 358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 359                           "command.\n");
 360                 return -ENOMEM;
 361         }
 362
 363         rate = iwl_rate_get_lowest_plcp(priv);
 364
 365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 366
 367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 368                               &frame->u.cmd[0]);
 369
 370         iwl_free_frame(priv, frame);
 371
 372         return rc;
 373 }
 374
 375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 376 {
 377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 378
 379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 380         if (sizeof(dma_addr_t) > sizeof(u32))
 381                 addr |=
 382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 383
 384         return addr;
 385 }
 386
 387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 388 {
 389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 390
 391         return le16_to_cpu(tb->hi_n_len) >> 4;
 392 }
 393
 394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 395                                   dma_addr_t addr, u16 len)
 396 {
 397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 398         u16 hi_n_len = len << 4;
 399
 400         put_unaligned_le32(addr, &tb->lo);
 401         if (sizeof(dma_addr_t) > sizeof(u32))
 402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 403
 404         tb->hi_n_len = cpu_to_le16(hi_n_len);
 405
 406         tfd->num_tbs = idx + 1;
 407 }
 408
 409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 410 {
 411         return tfd->num_tbs & 0x1f;
 412 }
 413
 414 /**
 415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 416  * @priv - driver private data
 417  * @txq - tx queue
 418  *
 419  * Does NOT advance any TFD circular buffer read/write indexes
 420  * Does NOT free the TFD itself (which is within circular buffer)
 421  */
 422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 423 {
 424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 425         struct iwl_tfd *tfd;
 426         struct pci_dev *dev = priv->pci_dev;
 427         int index = txq->q.read_ptr;
 428         int i;
 429         int num_tbs;
 430
 431         tfd = &tfd_tmp[index];
 432
 433         /* Sanity check on number of chunks */
 434         num_tbs = iwl_tfd_get_num_tbs(tfd);
 435
 436         if (num_tbs >= IWL_NUM_OF_TBS) {
 437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 438                 /* @todo issue fatal error, it is quite serious situation */
 439                 return;
 440         }
 441
 442         /* Unmap tx_cmd */
 443         if (num_tbs)
 444                 pci_unmap_single(dev,
 445                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 446                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 447                                 PCI_DMA_TODEVICE);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int ret;
 507         unsigned long flags;
 508         int txq_id = txq->q.id;
 509
 510         spin_lock_irqsave(&priv->lock, flags);
 511         ret = iwl_grab_nic_access(priv);
 512         if (ret) {
 513                 spin_unlock_irqrestore(&priv->lock, flags);
 514                 return ret;
 515         }
 516
 517         /* Circular buffer (TFD queue in DRAM) physical base address */
 518         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 519                              txq->q.dma_addr >> 8);
 520
 521         iwl_release_nic_access(priv);
 522         spin_unlock_irqrestore(&priv->lock, flags);
 523
 524         return 0;
 525 }
 526
 527
 528 /******************************************************************************
 529  *
 530  * Misc. internal state and helper functions
 531  *
 532  ******************************************************************************/
 533
 534 static void iwl_ht_conf(struct iwl_priv *priv,
 535                             struct ieee80211_bss_conf *bss_conf)
 536 {
 537         struct ieee80211_sta_ht_cap *ht_conf;
 538         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 539         struct ieee80211_sta *sta;
 540
 541         IWL_DEBUG_MAC80211("enter: \n");
 542
 543         if (!iwl_conf->is_ht)
 544                 return;
 545
 546
 547         /*
 548          * It is totally wrong to base global information on something
 549          * that is valid only when associated, alas, this driver works
 550          * that way and I don't know how to fix it.
 551          */
 552
 553         rcu_read_lock();
 554         sta = ieee80211_find_sta(priv->hw, priv->bssid);
 555         if (!sta) {
 556                 rcu_read_unlock();
 557                 return;
 558         }
 559         ht_conf = &sta->ht_cap;
 560
 561         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 562                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 563         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 564                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 565
 566         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 567         iwl_conf->max_amsdu_size =
 568                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 569
 570         iwl_conf->supported_chan_width =
 571                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 572
 573         /*
 574          * XXX: The HT configuration needs to be moved into iwl_mac_config()
 575          *      to be done there correctly.
 576          */
 577
 578         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 579         if (conf_is_ht40_minus(&priv->hw->conf))
 580                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 581         else if (conf_is_ht40_plus(&priv->hw->conf))
 582                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 583
 584         /* If no above or below channel supplied disable FAT channel */
 585         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
 586             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 587                 iwl_conf->supported_chan_width = 0;
 588
 589         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
 590
 591         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
 592
 593         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
 594         iwl_conf->ht_protection =
 595                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 596         iwl_conf->non_GF_STA_present =
 597                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 598
 599         rcu_read_unlock();
 600
 601         IWL_DEBUG_MAC80211("leave\n");
 602 }
 603
 604 /*
 605  * QoS  support
 606 */
 607 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 608 {
 609         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 610                 return;
 611
 612         priv->qos_data.def_qos_parm.qos_flags = 0;
 613
 614         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 615             !priv->qos_data.qos_cap.q_AP.txop_request)
 616                 priv->qos_data.def_qos_parm.qos_flags |=
 617                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 618         if (priv->qos_data.qos_active)
 619                 priv->qos_data.def_qos_parm.qos_flags |=
 620                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 621
 622         if (priv->current_ht_config.is_ht)
 623                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 624
 625         if (force || iwl_is_associated(priv)) {
 626                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 627                                 priv->qos_data.qos_active,
 628                                 priv->qos_data.def_qos_parm.qos_flags);
 629
 630                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 631                                        sizeof(struct iwl_qosparam_cmd),
 632                                        &priv->qos_data.def_qos_parm, NULL);
 633         }
 634 }
 635
 636 #define MAX_UCODE_BEACON_INTERVAL       4096
 637
 638 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 639 {
 640         u16 new_val = 0;
 641         u16 beacon_factor = 0;
 642
 643         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 644                                         / MAX_UCODE_BEACON_INTERVAL;
 645         new_val = beacon_val / beacon_factor;
 646
 647         return new_val;
 648 }
 649
 650 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 651 {
 652         u64 tsf;
 653         s32 interval_tm, rem;
 654         unsigned long flags;
 655         struct ieee80211_conf *conf = NULL;
 656         u16 beacon_int = 0;
 657
 658         conf = ieee80211_get_hw_conf(priv->hw);
 659
 660         spin_lock_irqsave(&priv->lock, flags);
 661         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 662         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 663
 664         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 665                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 666                 priv->rxon_timing.atim_window = 0;
 667         } else {
 668                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 669
 670                 /* TODO: we need to get atim_window from upper stack
 671                  * for now we set to 0 */
 672                 priv->rxon_timing.atim_window = 0;
 673         }
 674
 675         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 676
 677         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 678         interval_tm = beacon_int * 1024;
 679         rem = do_div(tsf, interval_tm);
 680         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 681
 682         spin_unlock_irqrestore(&priv->lock, flags);
 683         IWL_DEBUG_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
 684                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 685                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 686                         le16_to_cpu(priv->rxon_timing.atim_window));
 687 }
 688
 689 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 690 {
 691         iwl_connection_init_rx_config(priv, mode);
 692         iwl_set_rxon_chain(priv);
 693         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 694
 695         iwl_clear_stations_table(priv);
 696
 697         /* dont commit rxon if rf-kill is on*/
 698         if (!iwl_is_ready_rf(priv))
 699                 return -EAGAIN;
 700
 701         cancel_delayed_work(&priv->scan_check);
 702         if (iwl_scan_cancel_timeout(priv, 100)) {
 703                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 704                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
 705                 return -EAGAIN;
 706         }
 707
 708         iwl_commit_rxon(priv);
 709
 710         return 0;
 711 }
 712
 713 /******************************************************************************
 714  *
 715  * Generic RX handler implementations
 716  *
 717  ******************************************************************************/
 718 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 719                                 struct iwl_rx_mem_buffer *rxb)
 720 {
 721         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 722         struct iwl_alive_resp *palive;
 723         struct delayed_work *pwork;
 724
 725         palive = &pkt->u.alive_frame;
 726
 727         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
 728                        "0x%01X 0x%01X\n",
 729                        palive->is_valid, palive->ver_type,
 730                        palive->ver_subtype);
 731
 732         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 733                 IWL_DEBUG_INFO("Initialization Alive received.\n");
 734                 memcpy(&priv->card_alive_init,
 735                        &pkt->u.alive_frame,
 736                        sizeof(struct iwl_init_alive_resp));
 737                 pwork = &priv->init_alive_start;
 738         } else {
 739                 IWL_DEBUG_INFO("Runtime Alive received.\n");
 740                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 741                        sizeof(struct iwl_alive_resp));
 742                 pwork = &priv->alive_start;
 743         }
 744
 745         /* We delay the ALIVE response by 5ms to
 746          * give the HW RF Kill time to activate... */
 747         if (palive->is_valid == UCODE_VALID_OK)
 748                 queue_delayed_work(priv->workqueue, pwork,
 749                                    msecs_to_jiffies(5));
 750         else
 751                 IWL_WARN(priv, "uCode did not respond OK.\n");
 752 }
 753
 754 static void iwl_rx_reply_error(struct iwl_priv *priv,
 755                                    struct iwl_rx_mem_buffer *rxb)
 756 {
 757         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 758
 759         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
 760                 "seq 0x%04X ser 0x%08X\n",
 761                 le32_to_cpu(pkt->u.err_resp.error_type),
 762                 get_cmd_string(pkt->u.err_resp.cmd_id),
 763                 pkt->u.err_resp.cmd_id,
 764                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
 765                 le32_to_cpu(pkt->u.err_resp.error_info));
 766 }
 767
 768 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
 769                                       struct iwl_rx_mem_buffer *rxb)
 770 {
 771 #ifdef CONFIG_IWLWIFI_DEBUG
 772         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 773         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
 774         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
 775                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
 776 #endif
 777 }
 778
 779 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
 780                                              struct iwl_rx_mem_buffer *rxb)
 781 {
 782         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 783         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
 784                         "notification for %s:\n",
 785                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
 786         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
 787 }
 788
 789 static void iwl_bg_beacon_update(struct work_struct *work)
 790 {
 791         struct iwl_priv *priv =
 792                 container_of(work, struct iwl_priv, beacon_update);
 793         struct sk_buff *beacon;
 794
 795         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 796         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 797
 798         if (!beacon) {
 799                 IWL_ERR(priv, "update beacon failed\n");
 800                 return;
 801         }
 802
 803         mutex_lock(&priv->mutex);
 804         /* new beacon skb is allocated every time; dispose previous.*/
 805         if (priv->ibss_beacon)
 806                 dev_kfree_skb(priv->ibss_beacon);
 807
 808         priv->ibss_beacon = beacon;
 809         mutex_unlock(&priv->mutex);
 810
 811         iwl_send_beacon_cmd(priv);
 812 }
 813
 814 /**
 815  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 816  *
 817  * This callback is provided in order to send a statistics request.
 818  *
 819  * This timer function is continually reset to execute within
 820  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 821  * was received.  We need to ensure we receive the statistics in order
 822  * to update the temperature used for calibrating the TXPOWER.
 823  */
 824 static void iwl_bg_statistics_periodic(unsigned long data)
 825 {
 826         struct iwl_priv *priv = (struct iwl_priv *)data;
 827
 828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 829                 return;
 830
 831         /* dont send host command if rf-kill is on */
 832         if (!iwl_is_ready_rf(priv))
 833                 return;
 834
 835         iwl_send_statistics_request(priv, CMD_ASYNC);
 836 }
 837
 838 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 839                                 struct iwl_rx_mem_buffer *rxb)
 840 {
 841 #ifdef CONFIG_IWLWIFI_DEBUG
 842         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 843         struct iwl4965_beacon_notif *beacon =
 844                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 845         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 846
 847         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
 848                 "tsf %d %d rate %d\n",
 849                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 850                 beacon->beacon_notify_hdr.failure_frame,
 851                 le32_to_cpu(beacon->ibss_mgr_status),
 852                 le32_to_cpu(beacon->high_tsf),
 853                 le32_to_cpu(beacon->low_tsf), rate);
 854 #endif
 855
 856         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 857             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 858                 queue_work(priv->workqueue, &priv->beacon_update);
 859 }
 860
 861 /* Handle notification from uCode that card's power state is changing
 862  * due to software, hardware, or critical temperature RFKILL */
 863 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 864                                     struct iwl_rx_mem_buffer *rxb)
 865 {
 866         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 867         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 868         unsigned long status = priv->status;
 869
 870         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
 871                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 872                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 873
 874         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 875                      RF_CARD_DISABLED)) {
 876
 877                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 878                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 879
 880                 if (!iwl_grab_nic_access(priv)) {
 881                         iwl_write_direct32(
 882                                 priv, HBUS_TARG_MBX_C,
 883                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 884
 885                         iwl_release_nic_access(priv);
 886                 }
 887
 888                 if (!(flags & RXON_CARD_DISABLED)) {
 889                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 890                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 891                         if (!iwl_grab_nic_access(priv)) {
 892                                 iwl_write_direct32(
 893                                         priv, HBUS_TARG_MBX_C,
 894                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 895
 896                                 iwl_release_nic_access(priv);
 897                         }
 898                 }
 899
 900                 if (flags & RF_CARD_DISABLED) {
 901                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 902                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 903                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 904                         if (!iwl_grab_nic_access(priv))
 905                                 iwl_release_nic_access(priv);
 906                 }
 907         }
 908
 909         if (flags & HW_CARD_DISABLED)
 910                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 911         else
 912                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 913
 914
 915         if (flags & SW_CARD_DISABLED)
 916                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 917         else
 918                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 919
 920         if (!(flags & RXON_CARD_DISABLED))
 921                 iwl_scan_cancel(priv);
 922
 923         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 924              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 925             (test_bit(STATUS_RF_KILL_SW, &status) !=
 926              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 927                 queue_work(priv->workqueue, &priv->rf_kill);
 928         else
 929                 wake_up_interruptible(&priv->wait_command_queue);
 930 }
 931
 932 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 933 {
 934         int ret;
 935         unsigned long flags;
 936
 937         spin_lock_irqsave(&priv->lock, flags);
 938         ret = iwl_grab_nic_access(priv);
 939         if (ret)
 940                 goto err;
 941
 942         if (src == IWL_PWR_SRC_VAUX) {
 943                 u32 val;
 944                 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
 945                                             &val);
 946
 947                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 948                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 949                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 950                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 951         } else {
 952                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 953                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 954                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 955         }
 956
 957         iwl_release_nic_access(priv);
 958 err:
 959         spin_unlock_irqrestore(&priv->lock, flags);
 960         return ret;
 961 }
 962
 963 /**
 964  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 965  *
 966  * Setup the RX handlers for each of the reply types sent from the uCode
 967  * to the host.
 968  *
 969  * This function chains into the hardware specific files for them to setup
 970  * any hardware specific handlers as well.
 971  */
 972 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 973 {
 974         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 975         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 976         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 977         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 978         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 979             iwl_rx_pm_debug_statistics_notif;
 980         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 981
 982         /*
 983          * The same handler is used for both the REPLY to a discrete
 984          * statistics request from the host as well as for the periodic
 985          * statistics notifications (after received beacons) from the uCode.
 986          */
 987         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 988         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 989
 990         iwl_setup_spectrum_handlers(priv);
 991         iwl_setup_rx_scan_handlers(priv);
 992
 993         /* status change handler */
 994         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 995
 996         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 997             iwl_rx_missed_beacon_notif;
 998         /* Rx handlers */
 999         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1000         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1001         /* block ack */
1002         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1003         /* Set up hardware specific Rx handlers */
1004         priv->cfg->ops->lib->rx_handler_setup(priv);
1005 }
1006
1007 /**
1008  * iwl_rx_handle - Main entry function for receiving responses from uCode
1009  *
1010  * Uses the priv->rx_handlers callback function array to invoke
1011  * the appropriate handlers, including command responses,
1012  * frame-received notifications, and other notifications.
1013  */
1014 void iwl_rx_handle(struct iwl_priv *priv)
1015 {
1016         struct iwl_rx_mem_buffer *rxb;
1017         struct iwl_rx_packet *pkt;
1018         struct iwl_rx_queue *rxq = &priv->rxq;
1019         u32 r, i;
1020         int reclaim;
1021         unsigned long flags;
1022         u8 fill_rx = 0;
1023         u32 count = 8;
1024
1025         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1026          * buffer that the driver may process (last buffer filled by ucode). */
1027         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1028         i = rxq->read;
1029
1030         /* Rx interrupt, but nothing sent from uCode */
1031         if (i == r)
1032                 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
1033
1034         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1035                 fill_rx = 1;
1036
1037         while (i != r) {
1038                 rxb = rxq->queue[i];
1039
1040                 /* If an RXB doesn't have a Rx queue slot associated with it,
1041                  * then a bug has been introduced in the queue refilling
1042                  * routines -- catch it here */
1043                 BUG_ON(rxb == NULL);
1044
1045                 rxq->queue[i] = NULL;
1046
1047                 dma_sync_single_range_for_cpu(
1048                                 &priv->pci_dev->dev, rxb->real_dma_addr,
1049                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
1050                                 priv->hw_params.rx_buf_size,
1051                                 PCI_DMA_FROMDEVICE);
1052                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1053
1054                 /* Reclaim a command buffer only if this packet is a response
1055                  *   to a (driver-originated) command.
1056                  * If the packet (e.g. Rx frame) originated from uCode,
1057                  *   there is no command buffer to reclaim.
1058                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1059                  *   but apparently a few don't get set; catch them here. */
1060                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1061                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1062                         (pkt->hdr.cmd != REPLY_RX) &&
1063                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1064                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1065                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1066                         (pkt->hdr.cmd != REPLY_TX);
1067
1068                 /* Based on type of command response or notification,
1069                  *   handle those that need handling via function in
1070                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1071                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1072                         IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
1073                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1074                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1075                 } else {
1076                         /* No handling needed */
1077                         IWL_DEBUG(IWL_DL_RX,
1078                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1079                                 r, i, get_cmd_string(pkt->hdr.cmd),
1080                                 pkt->hdr.cmd);
1081                 }
1082
1083                 if (reclaim) {
1084                         /* Invoke any callbacks, transfer the skb to caller, and
1085                          * fire off the (possibly) blocking iwl_send_cmd()
1086                          * as we reclaim the driver command queue */
1087                         if (rxb && rxb->skb)
1088                                 iwl_tx_cmd_complete(priv, rxb);
1089                         else
1090                                 IWL_WARN(priv, "Claim null rxb?\n");
1091                 }
1092
1093                 /* For now we just don't re-use anything.  We can tweak this
1094                  * later to try and re-use notification packets and SKBs that
1095                  * fail to Rx correctly */
1096                 if (rxb->skb != NULL) {
1097                         priv->alloc_rxb_skb--;
1098                         dev_kfree_skb_any(rxb->skb);
1099                         rxb->skb = NULL;
1100                 }
1101
1102                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1103                                  priv->hw_params.rx_buf_size + 256,
1104                                  PCI_DMA_FROMDEVICE);
1105                 spin_lock_irqsave(&rxq->lock, flags);
1106                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1107                 spin_unlock_irqrestore(&rxq->lock, flags);
1108                 i = (i + 1) & RX_QUEUE_MASK;
1109                 /* If there are a lot of unused frames,
1110                  * restock the Rx queue so ucode wont assert. */
1111                 if (fill_rx) {
1112                         count++;
1113                         if (count >= 8) {
1114                                 priv->rxq.read = i;
1115                                 iwl_rx_queue_restock(priv);
1116                                 count = 0;
1117                         }
1118                 }
1119         }
1120
1121         /* Backtrack one entry */
1122         priv->rxq.read = i;
1123         iwl_rx_queue_restock(priv);
1124 }
1125
1126 /* call this function to flush any scheduled tasklet */
1127 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1128 {
1129         /* wait to make sure we flush pending tasklet*/
1130         synchronize_irq(priv->pci_dev->irq);
1131         tasklet_kill(&priv->irq_tasklet);
1132 }
1133
1134 static void iwl_error_recovery(struct iwl_priv *priv)
1135 {
1136         unsigned long flags;
1137
1138         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1139                sizeof(priv->staging_rxon));
1140         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1141         iwl_commit_rxon(priv);
1142
1143         iwl_rxon_add_station(priv, priv->bssid, 1);
1144
1145         spin_lock_irqsave(&priv->lock, flags);
1146         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1147         priv->error_recovering = 0;
1148         spin_unlock_irqrestore(&priv->lock, flags);
1149 }
1150
1151 static void iwl_irq_tasklet(struct iwl_priv *priv)
1152 {
1153         u32 inta, handled = 0;
1154         u32 inta_fh;
1155         unsigned long flags;
1156 #ifdef CONFIG_IWLWIFI_DEBUG
1157         u32 inta_mask;
1158 #endif
1159
1160         spin_lock_irqsave(&priv->lock, flags);
1161
1162         /* Ack/clear/reset pending uCode interrupts.
1163          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1164          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1165         inta = iwl_read32(priv, CSR_INT);
1166         iwl_write32(priv, CSR_INT, inta);
1167
1168         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1169          * Any new interrupts that happen after this, either while we're
1170          * in this tasklet, or later, will show up in next ISR/tasklet. */
1171         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1172         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1173
1174 #ifdef CONFIG_IWLWIFI_DEBUG
1175         if (priv->debug_level & IWL_DL_ISR) {
1176                 /* just for debug */
1177                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1178                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1179                               inta, inta_mask, inta_fh);
1180         }
1181 #endif
1182
1183         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1184          * atomic, make sure that inta covers all the interrupts that
1185          * we've discovered, even if FH interrupt came in just after
1186          * reading CSR_INT. */
1187         if (inta_fh & CSR49_FH_INT_RX_MASK)
1188                 inta |= CSR_INT_BIT_FH_RX;
1189         if (inta_fh & CSR49_FH_INT_TX_MASK)
1190                 inta |= CSR_INT_BIT_FH_TX;
1191
1192         /* Now service all interrupt bits discovered above. */
1193         if (inta & CSR_INT_BIT_HW_ERR) {
1194                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1195
1196                 /* Tell the device to stop sending interrupts */
1197                 iwl_disable_interrupts(priv);
1198
1199                 iwl_irq_handle_error(priv);
1200
1201                 handled |= CSR_INT_BIT_HW_ERR;
1202
1203                 spin_unlock_irqrestore(&priv->lock, flags);
1204
1205                 return;
1206         }
1207
1208 #ifdef CONFIG_IWLWIFI_DEBUG
1209         if (priv->debug_level & (IWL_DL_ISR)) {
1210                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1211                 if (inta & CSR_INT_BIT_SCD)
1212                         IWL_DEBUG_ISR("Scheduler finished to transmit "
1213                                       "the frame/frames.\n");
1214
1215                 /* Alive notification via Rx interrupt will do the real work */
1216                 if (inta & CSR_INT_BIT_ALIVE)
1217                         IWL_DEBUG_ISR("Alive interrupt\n");
1218         }
1219 #endif
1220         /* Safely ignore these bits for debug checks below */
1221         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1222
1223         /* HW RF KILL switch toggled */
1224         if (inta & CSR_INT_BIT_RF_KILL) {
1225                 int hw_rf_kill = 0;
1226                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1227                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1228                         hw_rf_kill = 1;
1229
1230                 IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
1231                                 hw_rf_kill ? "disable radio" : "enable radio");
1232
1233                 /* driver only loads ucode once setting the interface up.
1234                  * the driver allows loading the ucode even if the radio
1235                  * is killed. Hence update the killswitch state here. The
1236                  * rfkill handler will care about restarting if needed.
1237                  */
1238                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1239                         if (hw_rf_kill)
1240                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1241                         else
1242                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1243                         queue_work(priv->workqueue, &priv->rf_kill);
1244                 }
1245
1246                 handled |= CSR_INT_BIT_RF_KILL;
1247         }
1248
1249         /* Chip got too hot and stopped itself */
1250         if (inta & CSR_INT_BIT_CT_KILL) {
1251                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1252                 handled |= CSR_INT_BIT_CT_KILL;
1253         }
1254
1255         /* Error detected by uCode */
1256         if (inta & CSR_INT_BIT_SW_ERR) {
1257                 IWL_ERR(priv, "Microcode SW error detected. "
1258                         " Restarting 0x%X.\n", inta);
1259                 iwl_irq_handle_error(priv);
1260                 handled |= CSR_INT_BIT_SW_ERR;
1261         }
1262
1263         /* uCode wakes up after power-down sleep */
1264         if (inta & CSR_INT_BIT_WAKEUP) {
1265                 IWL_DEBUG_ISR("Wakeup interrupt\n");
1266                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1267                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1268                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1269                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1270                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1271                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1272                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1273
1274                 handled |= CSR_INT_BIT_WAKEUP;
1275         }
1276
1277         /* All uCode command responses, including Tx command responses,
1278          * Rx "responses" (frame-received notification), and other
1279          * notifications from uCode come through here*/
1280         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1281                 iwl_rx_handle(priv);
1282                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1283         }
1284
1285         if (inta & CSR_INT_BIT_FH_TX) {
1286                 IWL_DEBUG_ISR("Tx interrupt\n");
1287                 handled |= CSR_INT_BIT_FH_TX;
1288                 /* FH finished to write, send event */
1289                 priv->ucode_write_complete = 1;
1290                 wake_up_interruptible(&priv->wait_command_queue);
1291         }
1292
1293         if (inta & ~handled)
1294                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1295
1296         if (inta & ~CSR_INI_SET_MASK) {
1297                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1298                          inta & ~CSR_INI_SET_MASK);
1299                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1300         }
1301
1302         /* Re-enable all interrupts */
1303         /* only Re-enable if diabled by irq */
1304         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1305                 iwl_enable_interrupts(priv);
1306
1307 #ifdef CONFIG_IWLWIFI_DEBUG
1308         if (priv->debug_level & (IWL_DL_ISR)) {
1309                 inta = iwl_read32(priv, CSR_INT);
1310                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1311                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1312                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1313                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1314         }
1315 #endif
1316         spin_unlock_irqrestore(&priv->lock, flags);
1317 }
1318
1319 static irqreturn_t iwl_isr(int irq, void *data)
1320 {
1321         struct iwl_priv *priv = data;
1322         u32 inta, inta_mask;
1323         u32 inta_fh;
1324         if (!priv)
1325                 return IRQ_NONE;
1326
1327         spin_lock(&priv->lock);
1328
1329         /* Disable (but don't clear!) interrupts here to avoid
1330          *    back-to-back ISRs and sporadic interrupts from our NIC.
1331          * If we have something to service, the tasklet will re-enable ints.
1332          * If we *don't* have something, we'll re-enable before leaving here. */
1333         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1334         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1335
1336         /* Discover which interrupts are active/pending */
1337         inta = iwl_read32(priv, CSR_INT);
1338         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1339
1340         /* Ignore interrupt if there's nothing in NIC to service.
1341          * This may be due to IRQ shared with another device,
1342          * or due to sporadic interrupts thrown from our NIC. */
1343         if (!inta && !inta_fh) {
1344                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
1345                 goto none;
1346         }
1347
1348         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1349                 /* Hardware disappeared. It might have already raised
1350                  * an interrupt */
1351                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1352                 goto unplugged;
1353         }
1354
1355         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1356                       inta, inta_mask, inta_fh);
1357
1358         inta &= ~CSR_INT_BIT_SCD;
1359
1360         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1361         if (likely(inta || inta_fh))
1362                 tasklet_schedule(&priv->irq_tasklet);
1363
1364  unplugged:
1365         spin_unlock(&priv->lock);
1366         return IRQ_HANDLED;
1367
1368  none:
1369         /* re-enable interrupts here since we don't have anything to service. */
1370         /* only Re-enable if diabled by irq */
1371         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1372                 iwl_enable_interrupts(priv);
1373         spin_unlock(&priv->lock);
1374         return IRQ_NONE;
1375 }
1376
1377 /******************************************************************************
1378  *
1379  * uCode download functions
1380  *
1381  ******************************************************************************/
1382
1383 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1384 {
1385         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1386         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1387         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1388         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1389         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1390         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1391 }
1392
1393 static void iwl_nic_start(struct iwl_priv *priv)
1394 {
1395         /* Remove all resets to allow NIC to operate */
1396         iwl_write32(priv, CSR_RESET, 0);
1397 }
1398
1399
1400 /**
1401  * iwl_read_ucode - Read uCode images from disk file.
1402  *
1403  * Copy into buffers for card to fetch via bus-mastering
1404  */
1405 static int iwl_read_ucode(struct iwl_priv *priv)
1406 {
1407         struct iwl_ucode *ucode;
1408         int ret = -EINVAL, index;
1409         const struct firmware *ucode_raw;
1410         const char *name_pre = priv->cfg->fw_name_pre;
1411         const unsigned int api_max = priv->cfg->ucode_api_max;
1412         const unsigned int api_min = priv->cfg->ucode_api_min;
1413         char buf[25];
1414         u8 *src;
1415         size_t len;
1416         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1417
1418         /* Ask kernel firmware_class module to get the boot firmware off disk.
1419          * request_firmware() is synchronous, file is in memory on return. */
1420         for (index = api_max; index >= api_min; index--) {
1421                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1422                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1423                 if (ret < 0) {
1424                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1425                                   buf, ret);
1426                         if (ret == -ENOENT)
1427                                 continue;
1428                         else
1429                                 goto error;
1430                 } else {
1431                         if (index < api_max)
1432                                 IWL_ERR(priv, "Loaded firmware %s, "
1433                                         "which is deprecated. "
1434                                         "Please use API v%u instead.\n",
1435                                           buf, api_max);
1436
1437                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
1438                                        buf, ucode_raw->size);
1439                         break;
1440                 }
1441         }
1442
1443         if (ret < 0)
1444                 goto error;
1445
1446         /* Make sure that we got at least our header! */
1447         if (ucode_raw->size < sizeof(*ucode)) {
1448                 IWL_ERR(priv, "File size way too small!\n");
1449                 ret = -EINVAL;
1450                 goto err_release;
1451         }
1452
1453         /* Data from ucode file:  header followed by uCode images */
1454         ucode = (void *)ucode_raw->data;
1455
1456         priv->ucode_ver = le32_to_cpu(ucode->ver);
1457         api_ver = IWL_UCODE_API(priv->ucode_ver);
1458         inst_size = le32_to_cpu(ucode->inst_size);
1459         data_size = le32_to_cpu(ucode->data_size);
1460         init_size = le32_to_cpu(ucode->init_size);
1461         init_data_size = le32_to_cpu(ucode->init_data_size);
1462         boot_size = le32_to_cpu(ucode->boot_size);
1463
1464         /* api_ver should match the api version forming part of the
1465          * firmware filename ... but we don't check for that and only rely
1466          * on the API version read from firware header from here on forward */
1467
1468         if (api_ver < api_min || api_ver > api_max) {
1469                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1470                           "Driver supports v%u, firmware is v%u.\n",
1471                           api_max, api_ver);
1472                 priv->ucode_ver = 0;
1473                 ret = -EINVAL;
1474                 goto err_release;
1475         }
1476         if (api_ver != api_max)
1477                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1478                           "got v%u. New firmware can be obtained "
1479                           "from http://www.intellinuxwireless.org.\n",
1480                           api_max, api_ver);
1481
1482         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1483                IWL_UCODE_MAJOR(priv->ucode_ver),
1484                IWL_UCODE_MINOR(priv->ucode_ver),
1485                IWL_UCODE_API(priv->ucode_ver),
1486                IWL_UCODE_SERIAL(priv->ucode_ver));
1487
1488         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
1489                        priv->ucode_ver);
1490         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
1491                        inst_size);
1492         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
1493                        data_size);
1494         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
1495                        init_size);
1496         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
1497                        init_data_size);
1498         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
1499                        boot_size);
1500
1501         /* Verify size of file vs. image size info in file's header */
1502         if (ucode_raw->size < sizeof(*ucode) +
1503                 inst_size + data_size + init_size +
1504                 init_data_size + boot_size) {
1505
1506                 IWL_DEBUG_INFO("uCode file size %d too small\n",
1507                                (int)ucode_raw->size);
1508                 ret = -EINVAL;
1509                 goto err_release;
1510         }
1511
1512         /* Verify that uCode images will fit in card's SRAM */
1513         if (inst_size > priv->hw_params.max_inst_size) {
1514                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
1515                                inst_size);
1516                 ret = -EINVAL;
1517                 goto err_release;
1518         }
1519
1520         if (data_size > priv->hw_params.max_data_size) {
1521                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
1522                                 data_size);
1523                 ret = -EINVAL;
1524                 goto err_release;
1525         }
1526         if (init_size > priv->hw_params.max_inst_size) {
1527                 IWL_DEBUG_INFO
1528                     ("uCode init instr len %d too large to fit in\n",
1529                       init_size);
1530                 ret = -EINVAL;
1531                 goto err_release;
1532         }
1533         if (init_data_size > priv->hw_params.max_data_size) {
1534                 IWL_DEBUG_INFO
1535                     ("uCode init data len %d too large to fit in\n",
1536                       init_data_size);
1537                 ret = -EINVAL;
1538                 goto err_release;
1539         }
1540         if (boot_size > priv->hw_params.max_bsm_size) {
1541                 IWL_DEBUG_INFO
1542                     ("uCode boot instr len %d too large to fit in\n",
1543                       boot_size);
1544                 ret = -EINVAL;
1545                 goto err_release;
1546         }
1547
1548         /* Allocate ucode buffers for card's bus-master loading ... */
1549
1550         /* Runtime instructions and 2 copies of data:
1551          * 1) unmodified from disk
1552          * 2) backup cache for save/restore during power-downs */
1553         priv->ucode_code.len = inst_size;
1554         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1555
1556         priv->ucode_data.len = data_size;
1557         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1558
1559         priv->ucode_data_backup.len = data_size;
1560         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1561
1562         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1563             !priv->ucode_data_backup.v_addr)
1564                 goto err_pci_alloc;
1565
1566         /* Initialization instructions and data */
1567         if (init_size && init_data_size) {
1568                 priv->ucode_init.len = init_size;
1569                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1570
1571                 priv->ucode_init_data.len = init_data_size;
1572                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1573
1574                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1575                         goto err_pci_alloc;
1576         }
1577
1578         /* Bootstrap (instructions only, no data) */
1579         if (boot_size) {
1580                 priv->ucode_boot.len = boot_size;
1581                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1582
1583                 if (!priv->ucode_boot.v_addr)
1584                         goto err_pci_alloc;
1585         }
1586
1587         /* Copy images into buffers for card's bus-master reads ... */
1588
1589         /* Runtime instructions (first block of data in file) */
1590         src = &ucode->data[0];
1591         len = priv->ucode_code.len;
1592         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
1593         memcpy(priv->ucode_code.v_addr, src, len);
1594         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1595                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1596
1597         /* Runtime data (2nd block)
1598          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1599         src = &ucode->data[inst_size];
1600         len = priv->ucode_data.len;
1601         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
1602         memcpy(priv->ucode_data.v_addr, src, len);
1603         memcpy(priv->ucode_data_backup.v_addr, src, len);
1604
1605         /* Initialization instructions (3rd block) */
1606         if (init_size) {
1607                 src = &ucode->data[inst_size + data_size];
1608                 len = priv->ucode_init.len;
1609                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
1610                                 len);
1611                 memcpy(priv->ucode_init.v_addr, src, len);
1612         }
1613
1614         /* Initialization data (4th block) */
1615         if (init_data_size) {
1616                 src = &ucode->data[inst_size + data_size + init_size];
1617                 len = priv->ucode_init_data.len;
1618                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
1619                                len);
1620                 memcpy(priv->ucode_init_data.v_addr, src, len);
1621         }
1622
1623         /* Bootstrap instructions (5th block) */
1624         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1625         len = priv->ucode_boot.len;
1626         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
1627         memcpy(priv->ucode_boot.v_addr, src, len);
1628
1629         /* We have our copies now, allow OS release its copies */
1630         release_firmware(ucode_raw);
1631         return 0;
1632
1633  err_pci_alloc:
1634         IWL_ERR(priv, "failed to allocate pci memory\n");
1635         ret = -ENOMEM;
1636         iwl_dealloc_ucode_pci(priv);
1637
1638  err_release:
1639         release_firmware(ucode_raw);
1640
1641  error:
1642         return ret;
1643 }
1644
1645 /* temporary */
1646 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1647                                  struct sk_buff *skb);
1648
1649 /**
1650  * iwl_alive_start - called after REPLY_ALIVE notification received
1651  *                   from protocol/runtime uCode (initialization uCode's
1652  *                   Alive gets handled by iwl_init_alive_start()).
1653  */
1654 static void iwl_alive_start(struct iwl_priv *priv)
1655 {
1656         int ret = 0;
1657
1658         IWL_DEBUG_INFO("Runtime Alive received.\n");
1659
1660         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1661                 /* We had an error bringing up the hardware, so take it
1662                  * all the way back down so we can try again */
1663                 IWL_DEBUG_INFO("Alive failed.\n");
1664                 goto restart;
1665         }
1666
1667         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1668          * This is a paranoid check, because we would not have gotten the
1669          * "runtime" alive if code weren't properly loaded.  */
1670         if (iwl_verify_ucode(priv)) {
1671                 /* Runtime instruction load was bad;
1672                  * take it all the way back down so we can try again */
1673                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
1674                 goto restart;
1675         }
1676
1677         iwl_clear_stations_table(priv);
1678         ret = priv->cfg->ops->lib->alive_notify(priv);
1679         if (ret) {
1680                 IWL_WARN(priv,
1681                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1682                 goto restart;
1683         }
1684
1685         /* After the ALIVE response, we can send host commands to the uCode */
1686         set_bit(STATUS_ALIVE, &priv->status);
1687
1688         if (iwl_is_rfkill(priv))
1689                 return;
1690
1691         ieee80211_wake_queues(priv->hw);
1692
1693         priv->active_rate = priv->rates_mask;
1694         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1695
1696         if (iwl_is_associated(priv)) {
1697                 struct iwl_rxon_cmd *active_rxon =
1698                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1699
1700                 memcpy(&priv->staging_rxon, &priv->active_rxon,
1701                        sizeof(priv->staging_rxon));
1702                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1703         } else {
1704                 /* Initialize our rx_config data */
1705                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1706                 iwl_set_rxon_chain(priv);
1707                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1708         }
1709
1710         /* Configure Bluetooth device coexistence support */
1711         iwl_send_bt_config(priv);
1712
1713         iwl_reset_run_time_calib(priv);
1714
1715         /* Configure the adapter for unassociated operation */
1716         iwl_commit_rxon(priv);
1717
1718         /* At this point, the NIC is initialized and operational */
1719         iwl_rf_kill_ct_config(priv);
1720
1721         iwl_leds_register(priv);
1722
1723         IWL_DEBUG_INFO("ALIVE processing complete.\n");
1724         set_bit(STATUS_READY, &priv->status);
1725         wake_up_interruptible(&priv->wait_command_queue);
1726
1727         if (priv->error_recovering)
1728                 iwl_error_recovery(priv);
1729
1730         iwl_power_update_mode(priv, 1);
1731
1732         /* reassociate for ADHOC mode */
1733         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1734                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1735                                                                 priv->vif);
1736                 if (beacon)
1737                         iwl_mac_beacon_update(priv->hw, beacon);
1738         }
1739
1740
1741         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1742                 iwl_set_mode(priv, priv->iw_mode);
1743
1744         return;
1745
1746  restart:
1747         queue_work(priv->workqueue, &priv->restart);
1748 }
1749
1750 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1751
1752 static void __iwl_down(struct iwl_priv *priv)
1753 {
1754         unsigned long flags;
1755         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1756
1757         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
1758
1759         if (!exit_pending)
1760                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1761
1762         iwl_leds_unregister(priv);
1763
1764         iwl_clear_stations_table(priv);
1765
1766         /* Unblock any waiting calls */
1767         wake_up_interruptible_all(&priv->wait_command_queue);
1768
1769         /* Wipe out the EXIT_PENDING status bit if we are not actually
1770          * exiting the module */
1771         if (!exit_pending)
1772                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1773
1774         /* stop and reset the on-board processor */
1775         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1776
1777         /* tell the device to stop sending interrupts */
1778         spin_lock_irqsave(&priv->lock, flags);
1779         iwl_disable_interrupts(priv);
1780         spin_unlock_irqrestore(&priv->lock, flags);
1781         iwl_synchronize_irq(priv);
1782
1783         if (priv->mac80211_registered)
1784                 ieee80211_stop_queues(priv->hw);
1785
1786         /* If we have not previously called iwl_init() then
1787          * clear all bits but the RF Kill and SUSPEND bits and return */
1788         if (!iwl_is_init(priv)) {
1789                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1790                                         STATUS_RF_KILL_HW |
1791                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1792                                         STATUS_RF_KILL_SW |
1793                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1794                                         STATUS_GEO_CONFIGURED |
1795                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1796                                         STATUS_IN_SUSPEND |
1797                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1798                                         STATUS_EXIT_PENDING;
1799                 goto exit;
1800         }
1801
1802         /* ...otherwise clear out all the status bits but the RF Kill and
1803          * SUSPEND bits and continue taking the NIC down. */
1804         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1805                                 STATUS_RF_KILL_HW |
1806                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1807                                 STATUS_RF_KILL_SW |
1808                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1809                                 STATUS_GEO_CONFIGURED |
1810                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1811                                 STATUS_IN_SUSPEND |
1812                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1813                                 STATUS_FW_ERROR |
1814                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1815                                 STATUS_EXIT_PENDING;
1816
1817         spin_lock_irqsave(&priv->lock, flags);
1818         iwl_clear_bit(priv, CSR_GP_CNTRL,
1819                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1820         spin_unlock_irqrestore(&priv->lock, flags);
1821
1822         iwl_txq_ctx_stop(priv);
1823         iwl_rxq_stop(priv);
1824
1825         spin_lock_irqsave(&priv->lock, flags);
1826         if (!iwl_grab_nic_access(priv)) {
1827                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1828                                          APMG_CLK_VAL_DMA_CLK_RQT);
1829                 iwl_release_nic_access(priv);
1830         }
1831         spin_unlock_irqrestore(&priv->lock, flags);
1832
1833         udelay(5);
1834
1835         /* FIXME: apm_ops.suspend(priv) */
1836         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1837                 priv->cfg->ops->lib->apm_ops.stop(priv);
1838         else
1839                 priv->cfg->ops->lib->apm_ops.reset(priv);
1840  exit:
1841         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1842
1843         if (priv->ibss_beacon)
1844                 dev_kfree_skb(priv->ibss_beacon);
1845         priv->ibss_beacon = NULL;
1846
1847         /* clear out any free frames */
1848         iwl_clear_free_frames(priv);
1849 }
1850
1851 static void iwl_down(struct iwl_priv *priv)
1852 {
1853         mutex_lock(&priv->mutex);
1854         __iwl_down(priv);
1855         mutex_unlock(&priv->mutex);
1856
1857         iwl_cancel_deferred_work(priv);
1858 }
1859
1860 #define MAX_HW_RESTARTS 5
1861
1862 static int __iwl_up(struct iwl_priv *priv)
1863 {
1864         int i;
1865         int ret;
1866
1867         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1868                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1869                 return -EIO;
1870         }
1871
1872         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1873                 IWL_ERR(priv, "ucode not available for device bringup\n");
1874                 return -EIO;
1875         }
1876
1877         /* If platform's RF_KILL switch is NOT set to KILL */
1878         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1879                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1880         else
1881                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1882
1883         if (iwl_is_rfkill(priv)) {
1884                 iwl_enable_interrupts(priv);
1885                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1886                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1887                 return 0;
1888         }
1889
1890         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1891
1892         ret = iwl_hw_nic_init(priv);
1893         if (ret) {
1894                 IWL_ERR(priv, "Unable to init nic\n");
1895                 return ret;
1896         }
1897
1898         /* make sure rfkill handshake bits are cleared */
1899         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1900         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1901                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1902
1903         /* clear (again), then enable host interrupts */
1904         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1905         iwl_enable_interrupts(priv);
1906
1907         /* really make sure rfkill handshake bits are cleared */
1908         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1909         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1910
1911         /* Copy original ucode data image from disk into backup cache.
1912          * This will be used to initialize the on-board processor's
1913          * data SRAM for a clean start when the runtime program first loads. */
1914         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1915                priv->ucode_data.len);
1916
1917         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1918
1919                 iwl_clear_stations_table(priv);
1920
1921                 /* load bootstrap state machine,
1922                  * load bootstrap program into processor's memory,
1923                  * prepare to load the "initialize" uCode */
1924                 ret = priv->cfg->ops->lib->load_ucode(priv);
1925
1926                 if (ret) {
1927                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1928                                 ret);
1929                         continue;
1930                 }
1931
1932                 /* Clear out the uCode error bit if it is set */
1933                 clear_bit(STATUS_FW_ERROR, &priv->status);
1934
1935                 /* start card; "initialize" will load runtime ucode */
1936                 iwl_nic_start(priv);
1937
1938                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
1939
1940                 return 0;
1941         }
1942
1943         set_bit(STATUS_EXIT_PENDING, &priv->status);
1944         __iwl_down(priv);
1945         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1946
1947         /* tried to restart and config the device for as long as our
1948          * patience could withstand */
1949         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1950         return -EIO;
1951 }
1952
1953
1954 /*****************************************************************************
1955  *
1956  * Workqueue callbacks
1957  *
1958  *****************************************************************************/
1959
1960 static void iwl_bg_init_alive_start(struct work_struct *data)
1961 {
1962         struct iwl_priv *priv =
1963             container_of(data, struct iwl_priv, init_alive_start.work);
1964
1965         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1966                 return;
1967
1968         mutex_lock(&priv->mutex);
1969         priv->cfg->ops->lib->init_alive_start(priv);
1970         mutex_unlock(&priv->mutex);
1971 }
1972
1973 static void iwl_bg_alive_start(struct work_struct *data)
1974 {
1975         struct iwl_priv *priv =
1976             container_of(data, struct iwl_priv, alive_start.work);
1977
1978         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1979                 return;
1980
1981         mutex_lock(&priv->mutex);
1982         iwl_alive_start(priv);
1983         mutex_unlock(&priv->mutex);
1984 }
1985
1986 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1987 {
1988         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1989                         run_time_calib_work);
1990
1991         mutex_lock(&priv->mutex);
1992
1993         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1994             test_bit(STATUS_SCANNING, &priv->status)) {
1995                 mutex_unlock(&priv->mutex);
1996                 return;
1997         }
1998
1999         if (priv->start_calib) {
2000                 iwl_chain_noise_calibration(priv, &priv->statistics);
2001
2002                 iwl_sensitivity_calibration(priv, &priv->statistics);
2003         }
2004
2005         mutex_unlock(&priv->mutex);
2006         return;
2007 }
2008
2009 static void iwl_bg_up(struct work_struct *data)
2010 {
2011         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2012
2013         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2014                 return;
2015
2016         mutex_lock(&priv->mutex);
2017         __iwl_up(priv);
2018         mutex_unlock(&priv->mutex);
2019         iwl_rfkill_set_hw_state(priv);
2020 }
2021
2022 static void iwl_bg_restart(struct work_struct *data)
2023 {
2024         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2025
2026         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2027                 return;
2028
2029         iwl_down(priv);
2030         queue_work(priv->workqueue, &priv->up);
2031 }
2032
2033 static void iwl_bg_rx_replenish(struct work_struct *data)
2034 {
2035         struct iwl_priv *priv =
2036             container_of(data, struct iwl_priv, rx_replenish);
2037
2038         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2039                 return;
2040
2041         mutex_lock(&priv->mutex);
2042         iwl_rx_replenish(priv);
2043         mutex_unlock(&priv->mutex);
2044 }
2045
2046 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2047
2048 static void iwl_post_associate(struct iwl_priv *priv)
2049 {
2050         struct ieee80211_conf *conf = NULL;
2051         int ret = 0;
2052         unsigned long flags;
2053
2054         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2055                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2056                 return;
2057         }
2058
2059         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
2060                         priv->assoc_id, priv->active_rxon.bssid_addr);
2061
2062
2063         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2064                 return;
2065
2066
2067         if (!priv->vif || !priv->is_open)
2068                 return;
2069
2070         iwl_power_cancel_timeout(priv);
2071         iwl_scan_cancel_timeout(priv, 200);
2072
2073         conf = ieee80211_get_hw_conf(priv->hw);
2074
2075         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2076         iwl_commit_rxon(priv);
2077
2078         iwl_setup_rxon_timing(priv);
2079         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2080                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2081         if (ret)
2082                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2083                             "Attempting to continue.\n");
2084
2085         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2086
2087         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2088
2089         iwl_set_rxon_chain(priv);
2090         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2091
2092         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
2093                         priv->assoc_id, priv->beacon_int);
2094
2095         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2096                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2097         else
2098                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2099
2100         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2101                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2102                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2103                 else
2104                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2105
2106                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2107                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2108
2109         }
2110
2111         iwl_commit_rxon(priv);
2112
2113         switch (priv->iw_mode) {
2114         case NL80211_IFTYPE_STATION:
2115                 break;
2116
2117         case NL80211_IFTYPE_ADHOC:
2118
2119                 /* assume default assoc id */
2120                 priv->assoc_id = 1;
2121
2122                 iwl_rxon_add_station(priv, priv->bssid, 0);
2123                 iwl_send_beacon_cmd(priv);
2124
2125                 break;
2126
2127         default:
2128                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2129                           __func__, priv->iw_mode);
2130                 break;
2131         }
2132
2133         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2134                 priv->assoc_station_added = 1;
2135
2136         spin_lock_irqsave(&priv->lock, flags);
2137         iwl_activate_qos(priv, 0);
2138         spin_unlock_irqrestore(&priv->lock, flags);
2139
2140         /* the chain noise calibration will enabled PM upon completion
2141          * If chain noise has already been run, then we need to enable
2142          * power management here */
2143         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2144                 iwl_power_enable_management(priv);
2145
2146         /* Enable Rx differential gain and sensitivity calibrations */
2147         iwl_chain_noise_reset(priv);
2148         priv->start_calib = 1;
2149
2150 }
2151
2152 /*****************************************************************************
2153  *
2154  * mac80211 entry point functions
2155  *
2156  *****************************************************************************/
2157
2158 #define UCODE_READY_TIMEOUT     (4 * HZ)
2159
2160 static int iwl_mac_start(struct ieee80211_hw *hw)
2161 {
2162         struct iwl_priv *priv = hw->priv;
2163         int ret;
2164
2165         IWL_DEBUG_MAC80211("enter\n");
2166
2167         /* we should be verifying the device is ready to be opened */
2168         mutex_lock(&priv->mutex);
2169
2170         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2171         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2172          * ucode filename and max sizes are card-specific. */
2173
2174         if (!priv->ucode_code.len) {
2175                 ret = iwl_read_ucode(priv);
2176                 if (ret) {
2177                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2178                         mutex_unlock(&priv->mutex);
2179                         return ret;
2180                 }
2181         }
2182
2183         ret = __iwl_up(priv);
2184
2185         mutex_unlock(&priv->mutex);
2186
2187         iwl_rfkill_set_hw_state(priv);
2188
2189         if (ret)
2190                 return ret;
2191
2192         if (iwl_is_rfkill(priv))
2193                 goto out;
2194
2195         IWL_DEBUG_INFO("Start UP work done.\n");
2196
2197         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2198                 return 0;
2199
2200         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2201          * mac80211 will not be run successfully. */
2202         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2203                         test_bit(STATUS_READY, &priv->status),
2204                         UCODE_READY_TIMEOUT);
2205         if (!ret) {
2206                 if (!test_bit(STATUS_READY, &priv->status)) {
2207                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2208                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2209                         return -ETIMEDOUT;
2210                 }
2211         }
2212
2213 out:
2214         priv->is_open = 1;
2215         IWL_DEBUG_MAC80211("leave\n");
2216         return 0;
2217 }
2218
2219 static void iwl_mac_stop(struct ieee80211_hw *hw)
2220 {
2221         struct iwl_priv *priv = hw->priv;
2222
2223         IWL_DEBUG_MAC80211("enter\n");
2224
2225         if (!priv->is_open) {
2226                 IWL_DEBUG_MAC80211("leave - skip\n");
2227                 return;
2228         }
2229
2230         priv->is_open = 0;
2231
2232         if (iwl_is_ready_rf(priv)) {
2233                 /* stop mac, cancel any scan request and clear
2234                  * RXON_FILTER_ASSOC_MSK BIT
2235                  */
2236                 mutex_lock(&priv->mutex);
2237                 iwl_scan_cancel_timeout(priv, 100);
2238                 mutex_unlock(&priv->mutex);
2239         }
2240
2241         iwl_down(priv);
2242
2243         flush_workqueue(priv->workqueue);
2244
2245         /* enable interrupts again in order to receive rfkill changes */
2246         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2247         iwl_enable_interrupts(priv);
2248
2249         IWL_DEBUG_MAC80211("leave\n");
2250 }
2251
2252 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2253 {
2254         struct iwl_priv *priv = hw->priv;
2255
2256         IWL_DEBUG_MACDUMP("enter\n");
2257
2258         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2259                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2260
2261         if (iwl_tx_skb(priv, skb))
2262                 dev_kfree_skb_any(skb);
2263
2264         IWL_DEBUG_MACDUMP("leave\n");
2265         return NETDEV_TX_OK;
2266 }
2267
2268 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2269                                  struct ieee80211_if_init_conf *conf)
2270 {
2271         struct iwl_priv *priv = hw->priv;
2272         unsigned long flags;
2273
2274         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
2275
2276         if (priv->vif) {
2277                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
2278                 return -EOPNOTSUPP;
2279         }
2280
2281         spin_lock_irqsave(&priv->lock, flags);
2282         priv->vif = conf->vif;
2283         priv->iw_mode = conf->type;
2284
2285         spin_unlock_irqrestore(&priv->lock, flags);
2286
2287         mutex_lock(&priv->mutex);
2288
2289         if (conf->mac_addr) {
2290                 IWL_DEBUG_MAC80211("Set %pM\n", conf->mac_addr);
2291                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2292         }
2293
2294         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2295                 /* we are not ready, will run again when ready */
2296                 set_bit(STATUS_MODE_PENDING, &priv->status);
2297
2298         mutex_unlock(&priv->mutex);
2299
2300         IWL_DEBUG_MAC80211("leave\n");
2301         return 0;
2302 }
2303
2304 /**
2305  * iwl_mac_config - mac80211 config callback
2306  *
2307  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2308  * be set inappropriately and the driver currently sets the hardware up to
2309  * use it whenever needed.
2310  */
2311 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2312 {
2313         struct iwl_priv *priv = hw->priv;
2314         const struct iwl_channel_info *ch_info;
2315         struct ieee80211_conf *conf = &hw->conf;
2316         unsigned long flags;
2317         int ret = 0;
2318         u16 channel;
2319
2320         mutex_lock(&priv->mutex);
2321         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
2322
2323         priv->current_ht_config.is_ht = conf_is_ht(conf);
2324
2325         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2326                 IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
2327                 goto out;
2328         }
2329
2330         if (!conf->radio_enabled)
2331                 iwl_radio_kill_sw_disable_radio(priv);
2332
2333         if (!iwl_is_ready(priv)) {
2334                 IWL_DEBUG_MAC80211("leave - not ready\n");
2335                 ret = -EIO;
2336                 goto out;
2337         }
2338
2339         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2340                      test_bit(STATUS_SCANNING, &priv->status))) {
2341                 IWL_DEBUG_MAC80211("leave - scanning\n");
2342                 mutex_unlock(&priv->mutex);
2343                 return 0;
2344         }
2345
2346         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2347         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2348         if (!is_channel_valid(ch_info)) {
2349                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
2350                 ret = -EINVAL;
2351                 goto out;
2352         }
2353
2354         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2355             !is_channel_ibss(ch_info)) {
2356                 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2357                         conf->channel->hw_value, conf->channel->band);
2358                 ret = -EINVAL;
2359                 goto out;
2360         }
2361
2362         spin_lock_irqsave(&priv->lock, flags);
2363
2364
2365         /* if we are switching from ht to 2.4 clear flags
2366          * from any ht related info since 2.4 does not
2367          * support ht */
2368         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2369 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2370             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2371 #endif
2372         )
2373                 priv->staging_rxon.flags = 0;
2374
2375         iwl_set_rxon_channel(priv, conf->channel);
2376
2377         iwl_set_flags_for_band(priv, conf->channel->band);
2378
2379         /* The list of supported rates and rate mask can be different
2380          * for each band; since the band may have changed, reset
2381          * the rate mask to what mac80211 lists */
2382         iwl_set_rate(priv);
2383
2384         spin_unlock_irqrestore(&priv->lock, flags);
2385
2386 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2387         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2388                 iwl_hw_channel_switch(priv, conf->channel);
2389                 goto out;
2390         }
2391 #endif
2392
2393         if (!conf->radio_enabled) {
2394                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
2395                 goto out;
2396         }
2397
2398         if (iwl_is_rfkill(priv)) {
2399                 IWL_DEBUG_MAC80211("leave - RF kill\n");
2400                 ret = -EIO;
2401                 goto out;
2402         }
2403
2404         if (conf->flags & IEEE80211_CONF_PS)
2405                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2406         else
2407                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2408         if (ret)
2409                 IWL_DEBUG_MAC80211("Error setting power level\n");
2410
2411         IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
2412                            priv->tx_power_user_lmt, conf->power_level);
2413
2414         iwl_set_tx_power(priv, conf->power_level, false);
2415
2416         iwl_set_rate(priv);
2417
2418         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2419         iwl_set_rxon_chain(priv);
2420
2421         if (memcmp(&priv->active_rxon,
2422                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2423                 iwl_commit_rxon(priv);
2424         else
2425                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
2426
2427         IWL_DEBUG_MAC80211("leave\n");
2428
2429 out:
2430         mutex_unlock(&priv->mutex);
2431         return ret;
2432 }
2433
2434 static void iwl_config_ap(struct iwl_priv *priv)
2435 {
2436         int ret = 0;
2437         unsigned long flags;
2438
2439         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2440                 return;
2441
2442         /* The following should be done only at AP bring up */
2443         if (!iwl_is_associated(priv)) {
2444
2445                 /* RXON - unassoc (to set timing command) */
2446                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2447                 iwl_commit_rxon(priv);
2448
2449                 /* RXON Timing */
2450                 iwl_setup_rxon_timing(priv);
2451                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2452                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2453                 if (ret)
2454                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2455                                         "Attempting to continue.\n");
2456
2457                 iwl_set_rxon_chain(priv);
2458
2459                 /* FIXME: what should be the assoc_id for AP? */
2460                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2461                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2462                         priv->staging_rxon.flags |=
2463                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2464                 else
2465                         priv->staging_rxon.flags &=
2466                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2467
2468                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2469                         if (priv->assoc_capability &
2470                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2471                                 priv->staging_rxon.flags |=
2472                                         RXON_FLG_SHORT_SLOT_MSK;
2473                         else
2474                                 priv->staging_rxon.flags &=
2475                                         ~RXON_FLG_SHORT_SLOT_MSK;
2476
2477                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2478                                 priv->staging_rxon.flags &=
2479                                         ~RXON_FLG_SHORT_SLOT_MSK;
2480                 }
2481                 /* restore RXON assoc */
2482                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2483                 iwl_commit_rxon(priv);
2484                 spin_lock_irqsave(&priv->lock, flags);
2485                 iwl_activate_qos(priv, 1);
2486                 spin_unlock_irqrestore(&priv->lock, flags);
2487                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2488         }
2489         iwl_send_beacon_cmd(priv);
2490
2491         /* FIXME - we need to add code here to detect a totally new
2492          * configuration, reset the AP, unassoc, rxon timing, assoc,
2493          * clear sta table, add BCAST sta... */
2494 }
2495
2496
2497 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2498                                         struct ieee80211_vif *vif,
2499                                     struct ieee80211_if_conf *conf)
2500 {
2501         struct iwl_priv *priv = hw->priv;
2502         int rc;
2503
2504         if (conf == NULL)
2505                 return -EIO;
2506
2507         if (priv->vif != vif) {
2508                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
2509                 return 0;
2510         }
2511
2512         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2513             conf->changed & IEEE80211_IFCC_BEACON) {
2514                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2515                 if (!beacon)
2516                         return -ENOMEM;
2517                 mutex_lock(&priv->mutex);
2518                 rc = iwl_mac_beacon_update(hw, beacon);
2519                 mutex_unlock(&priv->mutex);
2520                 if (rc)
2521                         return rc;
2522         }
2523
2524         if (!iwl_is_alive(priv))
2525                 return -EAGAIN;
2526
2527         mutex_lock(&priv->mutex);
2528
2529         if (conf->bssid)
2530                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
2531
2532 /*
2533  * very dubious code was here; the probe filtering flag is never set:
2534  *
2535         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2536             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2537  */
2538
2539         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2540                 if (!conf->bssid) {
2541                         conf->bssid = priv->mac_addr;
2542                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2543                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
2544                                            conf->bssid);
2545                 }
2546                 if (priv->ibss_beacon)
2547                         dev_kfree_skb(priv->ibss_beacon);
2548
2549                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2550         }
2551
2552         if (iwl_is_rfkill(priv))
2553                 goto done;
2554
2555         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2556             !is_multicast_ether_addr(conf->bssid)) {
2557                 /* If there is currently a HW scan going on in the background
2558                  * then we need to cancel it else the RXON below will fail. */
2559                 if (iwl_scan_cancel_timeout(priv, 100)) {
2560                         IWL_WARN(priv, "Aborted scan still in progress "
2561                                     "after 100ms\n");
2562                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2563                         mutex_unlock(&priv->mutex);
2564                         return -EAGAIN;
2565                 }
2566                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2567
2568                 /* TODO: Audit driver for usage of these members and see
2569                  * if mac80211 deprecates them (priv->bssid looks like it
2570                  * shouldn't be there, but I haven't scanned the IBSS code
2571                  * to verify) - jpk */
2572                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2573
2574                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2575                         iwl_config_ap(priv);
2576                 else {
2577                         rc = iwl_commit_rxon(priv);
2578                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2579                                 iwl_rxon_add_station(
2580                                         priv, priv->active_rxon.bssid_addr, 1);
2581                 }
2582
2583         } else {
2584                 iwl_scan_cancel_timeout(priv, 100);
2585                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2586                 iwl_commit_rxon(priv);
2587         }
2588
2589  done:
2590         IWL_DEBUG_MAC80211("leave\n");
2591         mutex_unlock(&priv->mutex);
2592
2593         return 0;
2594 }
2595
2596 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2597                                      struct ieee80211_if_init_conf *conf)
2598 {
2599         struct iwl_priv *priv = hw->priv;
2600
2601         IWL_DEBUG_MAC80211("enter\n");
2602
2603         mutex_lock(&priv->mutex);
2604
2605         if (iwl_is_ready_rf(priv)) {
2606                 iwl_scan_cancel_timeout(priv, 100);
2607                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2608                 iwl_commit_rxon(priv);
2609         }
2610         if (priv->vif == conf->vif) {
2611                 priv->vif = NULL;
2612                 memset(priv->bssid, 0, ETH_ALEN);
2613         }
2614         mutex_unlock(&priv->mutex);
2615
2616         IWL_DEBUG_MAC80211("leave\n");
2617
2618 }
2619
2620 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2621 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2622                                      struct ieee80211_vif *vif,
2623                                      struct ieee80211_bss_conf *bss_conf,
2624                                      u32 changes)
2625 {
2626         struct iwl_priv *priv = hw->priv;
2627
2628         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
2629
2630         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2631                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
2632                                    bss_conf->use_short_preamble);
2633                 if (bss_conf->use_short_preamble)
2634                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2635                 else
2636                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2637         }
2638
2639         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2640                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
2641                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2642                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2643                 else
2644                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2645         }
2646
2647         if (changes & BSS_CHANGED_HT) {
2648                 iwl_ht_conf(priv, bss_conf);
2649                 iwl_set_rxon_chain(priv);
2650         }
2651
2652         if (changes & BSS_CHANGED_ASSOC) {
2653                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
2654                 /* This should never happen as this function should
2655                  * never be called from interrupt context. */
2656                 if (WARN_ON_ONCE(in_interrupt()))
2657                         return;
2658                 if (bss_conf->assoc) {
2659                         priv->assoc_id = bss_conf->aid;
2660                         priv->beacon_int = bss_conf->beacon_int;
2661                         priv->power_data.dtim_period = bss_conf->dtim_period;
2662                         priv->timestamp = bss_conf->timestamp;
2663                         priv->assoc_capability = bss_conf->assoc_capability;
2664
2665                         /* we have just associated, don't start scan too early
2666                          * leave time for EAPOL exchange to complete
2667                          */
2668                         priv->next_scan_jiffies = jiffies +
2669                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2670                         mutex_lock(&priv->mutex);
2671                         iwl_post_associate(priv);
2672                         mutex_unlock(&priv->mutex);
2673                 } else {
2674                         priv->assoc_id = 0;
2675                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
2676                 }
2677         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2678                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
2679                         iwl_send_rxon_assoc(priv);
2680         }
2681
2682 }
2683
2684 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
2685 {
2686         unsigned long flags;
2687         struct iwl_priv *priv = hw->priv;
2688         int ret;
2689
2690         IWL_DEBUG_MAC80211("enter\n");
2691
2692         mutex_lock(&priv->mutex);
2693         spin_lock_irqsave(&priv->lock, flags);
2694
2695         if (!iwl_is_ready_rf(priv)) {
2696                 ret = -EIO;
2697                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
2698                 goto out_unlock;
2699         }
2700
2701         /* We don't schedule scan within next_scan_jiffies period.
2702          * Avoid scanning during possible EAPOL exchange, return
2703          * success immediately.
2704          */
2705         if (priv->next_scan_jiffies &&
2706             time_after(priv->next_scan_jiffies, jiffies)) {
2707                 IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
2708                 queue_work(priv->workqueue, &priv->scan_completed);
2709                 ret = 0;
2710                 goto out_unlock;
2711         }
2712
2713         /* if we just finished scan ask for delay */
2714         if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
2715             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
2716                 IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
2717                 queue_work(priv->workqueue, &priv->scan_completed);
2718                 ret = 0;
2719                 goto out_unlock;
2720         }
2721
2722         if (ssid_len) {
2723                 priv->one_direct_scan = 1;
2724                 priv->direct_ssid_len =  min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
2725                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
2726         } else {
2727                 priv->one_direct_scan = 0;
2728         }
2729
2730         ret = iwl_scan_initiate(priv);
2731
2732         IWL_DEBUG_MAC80211("leave\n");
2733
2734 out_unlock:
2735         spin_unlock_irqrestore(&priv->lock, flags);
2736         mutex_unlock(&priv->mutex);
2737
2738         return ret;
2739 }
2740
2741 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2742                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2743                         u32 iv32, u16 *phase1key)
2744 {
2745
2746         struct iwl_priv *priv = hw->priv;
2747         IWL_DEBUG_MAC80211("enter\n");
2748
2749         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2750
2751         IWL_DEBUG_MAC80211("leave\n");
2752 }
2753
2754 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2755                            struct ieee80211_vif *vif,
2756                            struct ieee80211_sta *sta,
2757                            struct ieee80211_key_conf *key)
2758 {
2759         struct iwl_priv *priv = hw->priv;
2760         const u8 *addr;
2761         int ret;
2762         u8 sta_id;
2763         bool is_default_wep_key = false;
2764
2765         IWL_DEBUG_MAC80211("enter\n");
2766
2767         if (priv->hw_params.sw_crypto) {
2768                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
2769                 return -EOPNOTSUPP;
2770         }
2771         addr = sta ? sta->addr : iwl_bcast_addr;
2772         sta_id = iwl_find_station(priv, addr);
2773         if (sta_id == IWL_INVALID_STATION) {
2774                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
2775                                    addr);
2776                 return -EINVAL;
2777
2778         }
2779
2780         mutex_lock(&priv->mutex);
2781         iwl_scan_cancel_timeout(priv, 100);
2782         mutex_unlock(&priv->mutex);
2783
2784         /* If we are getting WEP group key and we didn't receive any key mapping
2785          * so far, we are in legacy wep mode (group key only), otherwise we are
2786          * in 1X mode.
2787          * In legacy wep mode, we use another host command to the uCode */
2788         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2789                 priv->iw_mode != NL80211_IFTYPE_AP) {
2790                 if (cmd == SET_KEY)
2791                         is_default_wep_key = !priv->key_mapping_key;
2792                 else
2793                         is_default_wep_key =
2794                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2795         }
2796
2797         switch (cmd) {
2798         case SET_KEY:
2799                 if (is_default_wep_key)
2800                         ret = iwl_set_default_wep_key(priv, key);
2801                 else
2802                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2803
2804                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
2805                 break;
2806         case DISABLE_KEY:
2807                 if (is_default_wep_key)
2808                         ret = iwl_remove_default_wep_key(priv, key);
2809                 else
2810                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2811
2812                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
2813                 break;
2814         default:
2815                 ret = -EINVAL;
2816         }
2817
2818         IWL_DEBUG_MAC80211("leave\n");
2819
2820         return ret;
2821 }
2822
2823 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2824                            const struct ieee80211_tx_queue_params *params)
2825 {
2826         struct iwl_priv *priv = hw->priv;
2827         unsigned long flags;
2828         int q;
2829
2830         IWL_DEBUG_MAC80211("enter\n");
2831
2832         if (!iwl_is_ready_rf(priv)) {
2833                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
2834                 return -EIO;
2835         }
2836
2837         if (queue >= AC_NUM) {
2838                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
2839                 return 0;
2840         }
2841
2842         q = AC_NUM - 1 - queue;
2843
2844         spin_lock_irqsave(&priv->lock, flags);
2845
2846         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2847         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2848         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2849         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2850                         cpu_to_le16((params->txop * 32));
2851
2852         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2853         priv->qos_data.qos_active = 1;
2854
2855         if (priv->iw_mode == NL80211_IFTYPE_AP)
2856                 iwl_activate_qos(priv, 1);
2857         else if (priv->assoc_id && iwl_is_associated(priv))
2858                 iwl_activate_qos(priv, 0);
2859
2860         spin_unlock_irqrestore(&priv->lock, flags);
2861
2862         IWL_DEBUG_MAC80211("leave\n");
2863         return 0;
2864 }
2865
2866 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2867                              enum ieee80211_ampdu_mlme_action action,
2868                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2869 {
2870         struct iwl_priv *priv = hw->priv;
2871
2872         IWL_DEBUG_HT("A-MPDU action on addr %pM tid %d\n",
2873                      sta->addr, tid);
2874
2875         if (!(priv->cfg->sku & IWL_SKU_N))
2876                 return -EACCES;
2877
2878         switch (action) {
2879         case IEEE80211_AMPDU_RX_START:
2880                 IWL_DEBUG_HT("start Rx\n");
2881                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2882         case IEEE80211_AMPDU_RX_STOP:
2883                 IWL_DEBUG_HT("stop Rx\n");
2884                 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2885         case IEEE80211_AMPDU_TX_START:
2886                 IWL_DEBUG_HT("start Tx\n");
2887                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2888         case IEEE80211_AMPDU_TX_STOP:
2889                 IWL_DEBUG_HT("stop Tx\n");
2890                 return iwl_tx_agg_stop(priv, sta->addr, tid);
2891         default:
2892                 IWL_DEBUG_HT("unknown\n");
2893                 return -EINVAL;
2894                 break;
2895         }
2896         return 0;
2897 }
2898
2899 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2900                                 struct ieee80211_tx_queue_stats *stats)
2901 {
2902         struct iwl_priv *priv = hw->priv;
2903         int i, avail;
2904         struct iwl_tx_queue *txq;
2905         struct iwl_queue *q;
2906         unsigned long flags;
2907
2908         IWL_DEBUG_MAC80211("enter\n");
2909
2910         if (!iwl_is_ready_rf(priv)) {
2911                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
2912                 return -EIO;
2913         }
2914
2915         spin_lock_irqsave(&priv->lock, flags);
2916
2917         for (i = 0; i < AC_NUM; i++) {
2918                 txq = &priv->txq[i];
2919                 q = &txq->q;
2920                 avail = iwl_queue_space(q);
2921
2922                 stats[i].len = q->n_window - avail;
2923                 stats[i].limit = q->n_window - q->high_mark;
2924                 stats[i].count = q->n_window;
2925
2926         }
2927         spin_unlock_irqrestore(&priv->lock, flags);
2928
2929         IWL_DEBUG_MAC80211("leave\n");
2930
2931         return 0;
2932 }
2933
2934 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2935                              struct ieee80211_low_level_stats *stats)
2936 {
2937         struct iwl_priv *priv = hw->priv;
2938
2939         priv = hw->priv;
2940         IWL_DEBUG_MAC80211("enter\n");
2941         IWL_DEBUG_MAC80211("leave\n");
2942
2943         return 0;
2944 }
2945
2946 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2947 {
2948         struct iwl_priv *priv = hw->priv;
2949         unsigned long flags;
2950
2951         mutex_lock(&priv->mutex);
2952         IWL_DEBUG_MAC80211("enter\n");
2953
2954         spin_lock_irqsave(&priv->lock, flags);
2955         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2956         spin_unlock_irqrestore(&priv->lock, flags);
2957
2958         iwl_reset_qos(priv);
2959
2960         spin_lock_irqsave(&priv->lock, flags);
2961         priv->assoc_id = 0;
2962         priv->assoc_capability = 0;
2963         priv->assoc_station_added = 0;
2964
2965         /* new association get rid of ibss beacon skb */
2966         if (priv->ibss_beacon)
2967                 dev_kfree_skb(priv->ibss_beacon);
2968
2969         priv->ibss_beacon = NULL;
2970
2971         priv->beacon_int = priv->hw->conf.beacon_int;
2972         priv->timestamp = 0;
2973         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2974                 priv->beacon_int = 0;
2975
2976         spin_unlock_irqrestore(&priv->lock, flags);
2977
2978         if (!iwl_is_ready_rf(priv)) {
2979                 IWL_DEBUG_MAC80211("leave - not ready\n");
2980                 mutex_unlock(&priv->mutex);
2981                 return;
2982         }
2983
2984         /* we are restarting association process
2985          * clear RXON_FILTER_ASSOC_MSK bit
2986          */
2987         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2988                 iwl_scan_cancel_timeout(priv, 100);
2989                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2990                 iwl_commit_rxon(priv);
2991         }
2992
2993         iwl_power_update_mode(priv, 0);
2994
2995         /* Per mac80211.h: This is only used in IBSS mode... */
2996         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2997
2998                 /* switch to CAM during association period.
2999                  * the ucode will block any association/authentication
3000                  * frome during assiciation period if it can not hear
3001                  * the AP because of PM. the timer enable PM back is
3002                  * association do not complete
3003                  */
3004                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3005                                                      IEEE80211_CHAN_RADAR))
3006                                 iwl_power_disable_management(priv, 3000);
3007
3008                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
3009                 mutex_unlock(&priv->mutex);
3010                 return;
3011         }
3012
3013         iwl_set_rate(priv);
3014
3015         mutex_unlock(&priv->mutex);
3016
3017         IWL_DEBUG_MAC80211("leave\n");
3018 }
3019
3020 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3021 {
3022         struct iwl_priv *priv = hw->priv;
3023         unsigned long flags;
3024         __le64 timestamp;
3025
3026         IWL_DEBUG_MAC80211("enter\n");
3027
3028         if (!iwl_is_ready_rf(priv)) {
3029                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3030                 return -EIO;
3031         }
3032
3033         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3034                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
3035                 return -EIO;
3036         }
3037
3038         spin_lock_irqsave(&priv->lock, flags);
3039
3040         if (priv->ibss_beacon)
3041                 dev_kfree_skb(priv->ibss_beacon);
3042
3043         priv->ibss_beacon = skb;
3044
3045         priv->assoc_id = 0;
3046         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3047         priv->timestamp = le64_to_cpu(timestamp);
3048
3049         IWL_DEBUG_MAC80211("leave\n");
3050         spin_unlock_irqrestore(&priv->lock, flags);
3051
3052         iwl_reset_qos(priv);
3053
3054         iwl_post_associate(priv);
3055
3056
3057         return 0;
3058 }
3059
3060 /*****************************************************************************
3061  *
3062  * sysfs attributes
3063  *
3064  *****************************************************************************/
3065
3066 #ifdef CONFIG_IWLWIFI_DEBUG
3067
3068 /*
3069  * The following adds a new attribute to the sysfs representation
3070  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3071  * used for controlling the debug level.
3072  *
3073  * See the level definitions in iwl for details.
3074  */
3075
3076 static ssize_t show_debug_level(struct device *d,
3077                                 struct device_attribute *attr, char *buf)
3078 {
3079         struct iwl_priv *priv = d->driver_data;
3080
3081         return sprintf(buf, "0x%08X\n", priv->debug_level);
3082 }
3083 static ssize_t store_debug_level(struct device *d,
3084                                 struct device_attribute *attr,
3085                                  const char *buf, size_t count)
3086 {
3087         struct iwl_priv *priv = d->driver_data;
3088         unsigned long val;
3089         int ret;
3090
3091         ret = strict_strtoul(buf, 0, &val);
3092         if (ret)
3093                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3094         else
3095                 priv->debug_level = val;
3096
3097         return strnlen(buf, count);
3098 }
3099
3100 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3101                         show_debug_level, store_debug_level);
3102
3103
3104 #endif /* CONFIG_IWLWIFI_DEBUG */
3105
3106
3107 static ssize_t show_version(struct device *d,
3108                                 struct device_attribute *attr, char *buf)
3109 {
3110         struct iwl_priv *priv = d->driver_data;
3111         struct iwl_alive_resp *palive = &priv->card_alive;
3112         ssize_t pos = 0;
3113         u16 eeprom_ver;
3114
3115         if (palive->is_valid)
3116                 pos += sprintf(buf + pos,
3117                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3118                                 "fw type: 0x%01X 0x%01X\n",
3119                                 palive->ucode_major, palive->ucode_minor,
3120                                 palive->sw_rev[0], palive->sw_rev[1],
3121                                 palive->ver_type, palive->ver_subtype);
3122         else
3123                 pos += sprintf(buf + pos, "fw not loaded\n");
3124
3125         if (priv->eeprom) {
3126                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3127                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3128                                  eeprom_ver);
3129         } else {
3130                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3131         }
3132
3133         return pos;
3134 }
3135
3136 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3137
3138 static ssize_t show_temperature(struct device *d,
3139                                 struct device_attribute *attr, char *buf)
3140 {
3141         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3142
3143         if (!iwl_is_alive(priv))
3144                 return -EAGAIN;
3145
3146         return sprintf(buf, "%d\n", priv->temperature);
3147 }
3148
3149 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3150
3151 static ssize_t show_tx_power(struct device *d,
3152                              struct device_attribute *attr, char *buf)
3153 {
3154         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3155
3156         if (!iwl_is_ready_rf(priv))
3157                 return sprintf(buf, "off\n");
3158         else
3159                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3160 }
3161
3162 static ssize_t store_tx_power(struct device *d,
3163                               struct device_attribute *attr,
3164                               const char *buf, size_t count)
3165 {
3166         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3167         unsigned long val;
3168         int ret;
3169
3170         ret = strict_strtoul(buf, 10, &val);
3171         if (ret)
3172                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3173         else
3174                 iwl_set_tx_power(priv, val, false);
3175
3176         return count;
3177 }
3178
3179 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3180
3181 static ssize_t show_flags(struct device *d,
3182                           struct device_attribute *attr, char *buf)
3183 {
3184         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3185
3186         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3187 }
3188
3189 static ssize_t store_flags(struct device *d,
3190                            struct device_attribute *attr,
3191                            const char *buf, size_t count)
3192 {
3193         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3194         unsigned long val;
3195         u32 flags;
3196         int ret = strict_strtoul(buf, 0, &val);
3197         if (ret)
3198                 return ret;
3199         flags = (u32)val;
3200
3201         mutex_lock(&priv->mutex);
3202         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3203                 /* Cancel any currently running scans... */
3204                 if (iwl_scan_cancel_timeout(priv, 100))
3205                         IWL_WARN(priv, "Could not cancel scan.\n");
3206                 else {
3207                         IWL_DEBUG_INFO("Commit rxon.flags = 0x%04X\n", flags);
3208                         priv->staging_rxon.flags = cpu_to_le32(flags);
3209                         iwl_commit_rxon(priv);
3210                 }
3211         }
3212         mutex_unlock(&priv->mutex);
3213
3214         return count;
3215 }
3216
3217 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3218
3219 static ssize_t show_filter_flags(struct device *d,
3220                                  struct device_attribute *attr, char *buf)
3221 {
3222         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3223
3224         return sprintf(buf, "0x%04X\n",
3225                 le32_to_cpu(priv->active_rxon.filter_flags));
3226 }
3227
3228 static ssize_t store_filter_flags(struct device *d,
3229                                   struct device_attribute *attr,
3230                                   const char *buf, size_t count)
3231 {
3232         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3233         unsigned long val;
3234         u32 filter_flags;
3235         int ret = strict_strtoul(buf, 0, &val);
3236         if (ret)
3237                 return ret;
3238         filter_flags = (u32)val;
3239
3240         mutex_lock(&priv->mutex);
3241         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3242                 /* Cancel any currently running scans... */
3243                 if (iwl_scan_cancel_timeout(priv, 100))
3244                         IWL_WARN(priv, "Could not cancel scan.\n");
3245                 else {
3246                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
3247                                        "0x%04X\n", filter_flags);
3248                         priv->staging_rxon.filter_flags =
3249                                 cpu_to_le32(filter_flags);
3250                         iwl_commit_rxon(priv);
3251                 }
3252         }
3253         mutex_unlock(&priv->mutex);
3254
3255         return count;
3256 }
3257
3258 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3259                    store_filter_flags);
3260
3261 static ssize_t store_power_level(struct device *d,
3262                                  struct device_attribute *attr,
3263                                  const char *buf, size_t count)
3264 {
3265         struct iwl_priv *priv = dev_get_drvdata(d);
3266         int ret;
3267         unsigned long mode;
3268
3269
3270         mutex_lock(&priv->mutex);
3271
3272         if (!iwl_is_ready(priv)) {
3273                 ret = -EAGAIN;
3274                 goto out;
3275         }
3276
3277         ret = strict_strtoul(buf, 10, &mode);
3278         if (ret)
3279                 goto out;
3280
3281         ret = iwl_power_set_user_mode(priv, mode);
3282         if (ret) {
3283                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
3284                 goto out;
3285         }
3286         ret = count;
3287
3288  out:
3289         mutex_unlock(&priv->mutex);
3290         return ret;
3291 }
3292
3293 static ssize_t show_power_level(struct device *d,
3294                                 struct device_attribute *attr, char *buf)
3295 {
3296         struct iwl_priv *priv = dev_get_drvdata(d);
3297         int mode = priv->power_data.user_power_setting;
3298         int system = priv->power_data.system_power_setting;
3299         int level = priv->power_data.power_mode;
3300         char *p = buf;
3301
3302         switch (system) {
3303         case IWL_POWER_SYS_AUTO:
3304                 p += sprintf(p, "SYSTEM:auto");
3305                 break;
3306         case IWL_POWER_SYS_AC:
3307                 p += sprintf(p, "SYSTEM:ac");
3308                 break;
3309         case IWL_POWER_SYS_BATTERY:
3310                 p += sprintf(p, "SYSTEM:battery");
3311                 break;
3312         }
3313
3314         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3315                         "fixed" : "auto");
3316         p += sprintf(p, "\tINDEX:%d", level);
3317         p += sprintf(p, "\n");
3318         return p - buf + 1;
3319 }
3320
3321 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3322                    store_power_level);
3323
3324
3325 static ssize_t show_statistics(struct device *d,
3326                                struct device_attribute *attr, char *buf)
3327 {
3328         struct iwl_priv *priv = dev_get_drvdata(d);
3329         u32 size = sizeof(struct iwl_notif_statistics);
3330         u32 len = 0, ofs = 0;
3331         u8 *data = (u8 *)&priv->statistics;
3332         int rc = 0;
3333
3334         if (!iwl_is_alive(priv))
3335                 return -EAGAIN;
3336
3337         mutex_lock(&priv->mutex);
3338         rc = iwl_send_statistics_request(priv, 0);
3339         mutex_unlock(&priv->mutex);
3340
3341         if (rc) {
3342                 len = sprintf(buf,
3343                               "Error sending statistics request: 0x%08X\n", rc);
3344                 return len;
3345         }
3346
3347         while (size && (PAGE_SIZE - len)) {
3348                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3349                                    PAGE_SIZE - len, 1);
3350                 len = strlen(buf);
3351                 if (PAGE_SIZE - len)
3352                         buf[len++] = '\n';
3353
3354                 ofs += 16;
3355                 size -= min(size, 16U);
3356         }
3357
3358         return len;
3359 }
3360
3361 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3362
3363
3364 /*****************************************************************************
3365  *
3366  * driver setup and teardown
3367  *
3368  *****************************************************************************/
3369
3370 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3371 {
3372         priv->workqueue = create_workqueue(DRV_NAME);
3373
3374         init_waitqueue_head(&priv->wait_command_queue);
3375
3376         INIT_WORK(&priv->up, iwl_bg_up);
3377         INIT_WORK(&priv->restart, iwl_bg_restart);
3378         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3379         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3380         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3381         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3382         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3383         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3384
3385         iwl_setup_scan_deferred_work(priv);
3386         iwl_setup_power_deferred_work(priv);
3387
3388         if (priv->cfg->ops->lib->setup_deferred_work)
3389                 priv->cfg->ops->lib->setup_deferred_work(priv);
3390
3391         init_timer(&priv->statistics_periodic);
3392         priv->statistics_periodic.data = (unsigned long)priv;
3393         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3394
3395         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3396                      iwl_irq_tasklet, (unsigned long)priv);
3397 }
3398
3399 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3400 {
3401         if (priv->cfg->ops->lib->cancel_deferred_work)
3402                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3403
3404         cancel_delayed_work_sync(&priv->init_alive_start);
3405         cancel_delayed_work(&priv->scan_check);
3406         cancel_delayed_work_sync(&priv->set_power_save);
3407         cancel_delayed_work(&priv->alive_start);
3408         cancel_work_sync(&priv->beacon_update);
3409         del_timer_sync(&priv->statistics_periodic);
3410 }
3411
3412 static struct attribute *iwl_sysfs_entries[] = {
3413         &dev_attr_flags.attr,
3414         &dev_attr_filter_flags.attr,
3415         &dev_attr_power_level.attr,
3416         &dev_attr_statistics.attr,
3417         &dev_attr_temperature.attr,
3418         &dev_attr_tx_power.attr,
3419 #ifdef CONFIG_IWLWIFI_DEBUG
3420         &dev_attr_debug_level.attr,
3421 #endif
3422         &dev_attr_version.attr,
3423
3424         NULL
3425 };
3426
3427 static struct attribute_group iwl_attribute_group = {
3428         .name = NULL,           /* put in device directory */
3429         .attrs = iwl_sysfs_entries,
3430 };
3431
3432 static struct ieee80211_ops iwl_hw_ops = {
3433         .tx = iwl_mac_tx,
3434         .start = iwl_mac_start,
3435         .stop = iwl_mac_stop,
3436         .add_interface = iwl_mac_add_interface,
3437         .remove_interface = iwl_mac_remove_interface,
3438         .config = iwl_mac_config,
3439         .config_interface = iwl_mac_config_interface,
3440         .configure_filter = iwl_configure_filter,
3441         .set_key = iwl_mac_set_key,
3442         .update_tkip_key = iwl_mac_update_tkip_key,
3443         .get_stats = iwl_mac_get_stats,
3444         .get_tx_stats = iwl_mac_get_tx_stats,
3445         .conf_tx = iwl_mac_conf_tx,
3446         .reset_tsf = iwl_mac_reset_tsf,
3447         .bss_info_changed = iwl_bss_info_changed,
3448         .ampdu_action = iwl_mac_ampdu_action,
3449         .hw_scan = iwl_mac_hw_scan
3450 };
3451
3452 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3453 {
3454         int err = 0;
3455         struct iwl_priv *priv;
3456         struct ieee80211_hw *hw;
3457         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3458         unsigned long flags;
3459         u16 pci_cmd;
3460
3461         /************************
3462          * 1. Allocating HW data
3463          ************************/
3464
3465         /* Disabling hardware scan means that mac80211 will perform scans
3466          * "the hard way", rather than using device's scan. */
3467         if (cfg->mod_params->disable_hw_scan) {
3468                 if (cfg->mod_params->debug & IWL_DL_INFO)
3469                         dev_printk(KERN_DEBUG, &(pdev->dev),
3470                                    "Disabling hw_scan\n");
3471                 iwl_hw_ops.hw_scan = NULL;
3472         }
3473
3474         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3475         if (!hw) {
3476                 err = -ENOMEM;
3477                 goto out;
3478         }
3479         priv = hw->priv;
3480         /* At this point both hw and priv are allocated. */
3481
3482         SET_IEEE80211_DEV(hw, &pdev->dev);
3483
3484         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
3485         priv->cfg = cfg;
3486         priv->pci_dev = pdev;
3487
3488 #ifdef CONFIG_IWLWIFI_DEBUG
3489         priv->debug_level = priv->cfg->mod_params->debug;
3490         atomic_set(&priv->restrict_refcnt, 0);
3491 #endif
3492
3493         /**************************
3494          * 2. Initializing PCI bus
3495          **************************/
3496         if (pci_enable_device(pdev)) {
3497                 err = -ENODEV;
3498                 goto out_ieee80211_free_hw;
3499         }
3500
3501         pci_set_master(pdev);
3502
3503         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3504         if (!err)
3505                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3506         if (err) {
3507                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3508                 if (!err)
3509                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3510                 /* both attempts failed: */
3511                 if (err) {
3512                         IWL_WARN(priv, "No suitable DMA available.\n");
3513                         goto out_pci_disable_device;
3514                 }
3515         }
3516
3517         err = pci_request_regions(pdev, DRV_NAME);
3518         if (err)
3519                 goto out_pci_disable_device;
3520
3521         pci_set_drvdata(pdev, priv);
3522
3523
3524         /***********************
3525          * 3. Read REV register
3526          ***********************/
3527         priv->hw_base = pci_iomap(pdev, 0, 0);
3528         if (!priv->hw_base) {
3529                 err = -ENODEV;
3530                 goto out_pci_release_regions;
3531         }
3532
3533         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
3534                 (unsigned long long) pci_resource_len(pdev, 0));
3535         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
3536
3537         iwl_hw_detect(priv);
3538         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3539                 priv->cfg->name, priv->hw_rev);
3540
3541         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3542          * PCI Tx retries from interfering with C3 CPU state */
3543         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3544
3545         /* amp init */
3546         err = priv->cfg->ops->lib->apm_ops.init(priv);
3547         if (err < 0) {
3548                 IWL_DEBUG_INFO("Failed to init APMG\n");
3549                 goto out_iounmap;
3550         }
3551         /*****************
3552          * 4. Read EEPROM
3553          *****************/
3554         /* Read the EEPROM */
3555         err = iwl_eeprom_init(priv);
3556         if (err) {
3557                 IWL_ERR(priv, "Unable to init EEPROM\n");
3558                 goto out_iounmap;
3559         }
3560         err = iwl_eeprom_check_version(priv);
3561         if (err)
3562                 goto out_iounmap;
3563
3564         /* extract MAC Address */
3565         iwl_eeprom_get_mac(priv, priv->mac_addr);
3566         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
3567         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3568
3569         /************************
3570          * 5. Setup HW constants
3571          ************************/
3572         if (iwl_set_hw_params(priv)) {
3573                 IWL_ERR(priv, "failed to set hw parameters\n");
3574                 goto out_free_eeprom;
3575         }
3576
3577         /*******************
3578          * 6. Setup priv
3579          *******************/
3580
3581         err = iwl_init_drv(priv);
3582         if (err)
3583                 goto out_free_eeprom;
3584         /* At this point both hw and priv are initialized. */
3585
3586         /**********************************
3587          * 7. Initialize module parameters
3588          **********************************/
3589
3590         /* Disable radio (SW RF KILL) via parameter when loading driver */
3591         if (priv->cfg->mod_params->disable) {
3592                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3593                 IWL_DEBUG_INFO("Radio disabled.\n");
3594         }
3595
3596         /********************
3597          * 8. Setup services
3598          ********************/
3599         spin_lock_irqsave(&priv->lock, flags);
3600         iwl_disable_interrupts(priv);
3601         spin_unlock_irqrestore(&priv->lock, flags);
3602
3603         pci_enable_msi(priv->pci_dev);
3604
3605         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3606                           DRV_NAME, priv);
3607         if (err) {
3608                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3609                 goto out_disable_msi;
3610         }
3611         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3612         if (err) {
3613                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3614                 goto out_uninit_drv;
3615         }
3616
3617         iwl_setup_deferred_work(priv);
3618         iwl_setup_rx_handlers(priv);
3619
3620         /**********************************
3621          * 9. Setup and register mac80211
3622          **********************************/
3623
3624         /* enable interrupts if needed: hw bug w/a */
3625         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3626         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3627                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3628                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3629         }
3630
3631         iwl_enable_interrupts(priv);
3632
3633         err = iwl_setup_mac(priv);
3634         if (err)
3635                 goto out_remove_sysfs;
3636
3637         err = iwl_dbgfs_register(priv, DRV_NAME);
3638         if (err)
3639                 IWL_ERR(priv, "failed to create debugfs files\n");
3640
3641         /* If platform's RF_KILL switch is NOT set to KILL */
3642         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3643                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3644         else
3645                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3646
3647         err = iwl_rfkill_init(priv);
3648         if (err)
3649                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3650                                   "Ignoring error: %d\n", err);
3651         else
3652                 iwl_rfkill_set_hw_state(priv);
3653
3654         iwl_power_initialize(priv);
3655         return 0;
3656
3657  out_remove_sysfs:
3658         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3659  out_disable_msi:
3660         pci_disable_msi(priv->pci_dev);
3661         pci_disable_device(priv->pci_dev);
3662  out_uninit_drv:
3663         iwl_uninit_drv(priv);
3664  out_free_eeprom:
3665         iwl_eeprom_free(priv);
3666  out_iounmap:
3667         pci_iounmap(pdev, priv->hw_base);
3668  out_pci_release_regions:
3669         pci_release_regions(pdev);
3670         pci_set_drvdata(pdev, NULL);
3671  out_pci_disable_device:
3672         pci_disable_device(pdev);
3673  out_ieee80211_free_hw:
3674         ieee80211_free_hw(priv->hw);
3675  out:
3676         return err;
3677 }
3678
3679 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3680 {
3681         struct iwl_priv *priv = pci_get_drvdata(pdev);
3682         unsigned long flags;
3683
3684         if (!priv)
3685                 return;
3686
3687         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
3688
3689         iwl_dbgfs_unregister(priv);
3690         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3691
3692         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3693          * to be called and iwl_down since we are removing the device
3694          * we need to set STATUS_EXIT_PENDING bit.
3695          */
3696         set_bit(STATUS_EXIT_PENDING, &priv->status);
3697         if (priv->mac80211_registered) {
3698                 ieee80211_unregister_hw(priv->hw);
3699                 priv->mac80211_registered = 0;
3700         } else {
3701                 iwl_down(priv);
3702         }
3703
3704         /* make sure we flush any pending irq or
3705          * tasklet for the driver
3706          */
3707         spin_lock_irqsave(&priv->lock, flags);
3708         iwl_disable_interrupts(priv);
3709         spin_unlock_irqrestore(&priv->lock, flags);
3710
3711         iwl_synchronize_irq(priv);
3712
3713         iwl_rfkill_unregister(priv);
3714         iwl_dealloc_ucode_pci(priv);
3715
3716         if (priv->rxq.bd)
3717                 iwl_rx_queue_free(priv, &priv->rxq);
3718         iwl_hw_txq_ctx_free(priv);
3719
3720         iwl_clear_stations_table(priv);
3721         iwl_eeprom_free(priv);
3722
3723
3724         /*netif_stop_queue(dev); */
3725         flush_workqueue(priv->workqueue);
3726
3727         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3728          * priv->workqueue... so we can't take down the workqueue
3729          * until now... */
3730         destroy_workqueue(priv->workqueue);
3731         priv->workqueue = NULL;
3732
3733         free_irq(priv->pci_dev->irq, priv);
3734         pci_disable_msi(priv->pci_dev);
3735         pci_iounmap(pdev, priv->hw_base);
3736         pci_release_regions(pdev);
3737         pci_disable_device(pdev);
3738         pci_set_drvdata(pdev, NULL);
3739
3740         iwl_uninit_drv(priv);
3741
3742         if (priv->ibss_beacon)
3743                 dev_kfree_skb(priv->ibss_beacon);
3744
3745         ieee80211_free_hw(priv->hw);
3746 }
3747
3748 #ifdef CONFIG_PM
3749
3750 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3751 {
3752         struct iwl_priv *priv = pci_get_drvdata(pdev);
3753
3754         if (priv->is_open) {
3755                 set_bit(STATUS_IN_SUSPEND, &priv->status);
3756                 iwl_mac_stop(priv->hw);
3757                 priv->is_open = 1;
3758         }
3759
3760         pci_save_state(pdev);
3761         pci_disable_device(pdev);
3762         pci_set_power_state(pdev, PCI_D3hot);
3763
3764         return 0;
3765 }
3766
3767 static int iwl_pci_resume(struct pci_dev *pdev)
3768 {
3769         struct iwl_priv *priv = pci_get_drvdata(pdev);
3770         int ret;
3771
3772         pci_set_power_state(pdev, PCI_D0);
3773         ret = pci_enable_device(pdev);
3774         if (ret)
3775                 return ret;
3776         pci_restore_state(pdev);
3777         iwl_enable_interrupts(priv);
3778
3779         if (priv->is_open)
3780                 iwl_mac_start(priv->hw);
3781
3782         clear_bit(STATUS_IN_SUSPEND, &priv->status);
3783         return 0;
3784 }
3785
3786 #endif /* CONFIG_PM */
3787
3788 /*****************************************************************************
3789  *
3790  * driver and module entry point
3791  *
3792  *****************************************************************************/
3793
3794 /* Hardware specific file defines the PCI IDs table for that hardware module */
3795 static struct pci_device_id iwl_hw_card_ids[] = {
3796 #ifdef CONFIG_IWL4965
3797         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3798         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3799 #endif /* CONFIG_IWL4965 */
3800 #ifdef CONFIG_IWL5000
3801         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3802         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3803         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3804         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3805         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3806         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3807         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3808         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3809         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3810         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3811 /* 5350 WiFi/WiMax */
3812         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3813         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3814         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3815 /* 5150 Wifi/WiMax */
3816         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3817         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3818 /* 6000/6050 Series */
3819         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3820         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3821         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3822         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3823         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3824         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3825         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3826         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3827         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3828         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3829         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3830 /* 100 Series WiFi */
3831         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl100_bgn_cfg)},
3832         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl100_bgn_cfg)},
3833 #endif /* CONFIG_IWL5000 */
3834
3835         {0}
3836 };
3837 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3838
3839 static struct pci_driver iwl_driver = {
3840         .name = DRV_NAME,
3841         .id_table = iwl_hw_card_ids,
3842         .probe = iwl_pci_probe,
3843         .remove = __devexit_p(iwl_pci_remove),
3844 #ifdef CONFIG_PM
3845         .suspend = iwl_pci_suspend,
3846         .resume = iwl_pci_resume,
3847 #endif
3848 };
3849
3850 static int __init iwl_init(void)
3851 {
3852
3853         int ret;
3854         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3855         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3856
3857         ret = iwlagn_rate_control_register();
3858         if (ret) {
3859                 printk(KERN_ERR DRV_NAME
3860                        "Unable to register rate control algorithm: %d\n", ret);
3861                 return ret;
3862         }
3863
3864         ret = pci_register_driver(&iwl_driver);
3865         if (ret) {
3866                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3867                 goto error_register;
3868         }
3869
3870         return ret;
3871
3872 error_register:
3873         iwlagn_rate_control_unregister();
3874         return ret;
3875 }
3876
3877 static void __exit iwl_exit(void)
3878 {
3879         pci_unregister_driver(&iwl_driver);
3880         iwlagn_rate_control_unregister();
3881 }
3882
3883 module_exit(iwl_exit);
3884 module_init(iwl_init);